diff --git a/app/api/core/dependencies/dependencies.py b/app/api/core/dependencies/dependencies.py
new file mode 100644
index 0000000..361233a
--- /dev/null
+++ b/app/api/core/dependencies/dependencies.py
@@ -0,0 +1,46 @@
+Here's the `dependencies.py` file for the specified location `app/api/core/dependencies/`:
+
+```python
+from typing import Generator
+
+from sqlalchemy.orm import Session
+
+from app.api.db.database import SessionLocal
+
+def get_db() -> Generator[Session, None, None]:
+    """
+    Dependency function that provides a SQLAlchemy session.
+
+    Yields:
+        Session: A SQLAlchemy session instance.
+    """
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+```
+
+This file defines a `get_db` function that serves as a dependency for FastAPI routes that require a database session. The function uses the `SessionLocal` object from `app.api.db.database` to create a new SQLAlchemy session, which is then yielded to the requesting route.
+
+The `get_db` function is a generator function that yields the session instance and ensures it is properly closed after the requesting route has finished executing.
+
+To use this dependency in a FastAPI route, you can include it as a function parameter, and FastAPI will automatically resolve the dependency by calling the `get_db` function and providing the yielded session instance. For example:
+
+```python
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+
+from app.api.core.dependencies import get_db
+
+router = APIRouter()
+
+@router.get("/items")
+def get_items(db: Session = Depends(get_db)):
+    # Use the provided db session to interact with the database
+    ...
+```
+
+In this example, the `get_items` route receives a `Session` instance as the `db` parameter, which is automatically provided by FastAPI by calling the `get_db` dependency function.
+
+Note that you'll need to configure the `SessionLocal` object in `app.api.db.database` to connect to your SQLite database using the appropriate connection string and engine configuration.
\ No newline at end of file
diff --git a/app/api/core/middleware/activity_tracker.py b/app/api/core/middleware/activity_tracker.py
new file mode 100644
index 0000000..66f6386
--- /dev/null
+++ b/app/api/core/middleware/activity_tracker.py
@@ -0,0 +1,52 @@
+Here's the `activity_tracker.py` file with the `ActivityTrackerMiddleware` class that logs request method, URL, and processing time:
+
+```python
+# app/api/core/middleware/activity_tracker.py
+
+import time
+from starlette.middleware.base import BaseHTTPMiddleware
+from starlette.requests import Request
+from starlette.responses import Response
+
+class ActivityTrackerMiddleware(BaseHTTPMiddleware):
+    async def dispatch(self, request: Request, call_next):
+        start_time = time.time()
+        request_method = request.method
+        request_url = str(request.url)
+
+        try:
+            response = await call_next(request)
+        finally:
+            process_time = time.time() - start_time
+            log_message = f"{request_method} {request_url} - {process_time:.6f} seconds"
+            print(log_message)
+
+        return response
+```
+
+This middleware class extends the `BaseHTTPMiddleware` class from Starlette, which is the underlying ASGI server used by FastAPI. The `dispatch` method is the entry point for the middleware, which is called for every incoming request.
+
+Here's how the middleware works:
+
+1. The `dispatch` method is called with the incoming `Request` object and a `call_next` function.
+2. The current time is recorded using `time.time()` to calculate the processing time later.
+3. The request method and URL are extracted from the `Request` object.
+4. The `call_next` function is called with the `Request` object, which passes the request to the next middleware or the application itself. The response from the application is stored in the `response` variable.
+5. After the response is received, the processing time is calculated by subtracting the start time from the current time.
+6. A log message is constructed with the request method, URL, and processing time, and printed to the console using `print`.
+7. The `response` is returned to the caller.
+
+To use this middleware in your FastAPI application, you need to add it to the list of middleware in your `main.py` file:
+
+```python
+# main.py
+from fastapi import FastAPI
+from app.api.core.middleware.activity_tracker import ActivityTrackerMiddleware
+
+app = FastAPI()
+app.add_middleware(ActivityTrackerMiddleware)
+
+# ... other routes and configurations ...
+```
+
+With this middleware in place, every incoming request to your FastAPI application will be logged with its method, URL, and processing time.
\ No newline at end of file
diff --git a/app/api/db/database.py b/app/api/db/database.py
new file mode 100644
index 0000000..9fb4c0c
--- /dev/null
+++ b/app/api/db/database.py
@@ -0,0 +1,48 @@
+Here's the `database.py` file for your FastAPI backend named 'blog_app' with SQLite configuration using SQLAlchemy:
+
+```python
+# app/api/db/database.py
+
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+# SQLite database URL
+SQLALCHEMY_DATABASE_URL = "sqlite:///./blog_app.db"
+
+# Create the SQLAlchemy engine
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
+)
+
+# Create a SessionLocal class for database sessions
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Create a Base class for models
+Base = declarative_base()
+```
+
+This file contains the following components:
+
+1. **SQLALCHEMY_DATABASE_URL**: The URL for the SQLite database file `blog_app.db`.
+2. **engine**: The SQLAlchemy engine created using the `create_engine` function with the `SQLALCHEMY_DATABASE_URL` and a specific connection argument for SQLite (`check_same_thread=False`).
+3. **SessionLocal**: A class that creates database sessions using the `sessionmaker` function. The `autocommit` and `autoflush` parameters are set to `False` for better control over transactions.
+4. **Base**: A base class for defining SQLAlchemy models, created using the `declarative_base` function.
+
+You can import and use these components in your FastAPI application as follows:
+
+```python
+# Import the required components
+from app.api.db.database import SessionLocal, engine, Base
+
+# Create a database session
+db = SessionLocal()
+
+# Use the session for database operations
+# ...
+
+# Close the session
+db.close()
+```
+
+Make sure to create the `app/api/db/` directory in your project structure before adding this file.
\ No newline at end of file
diff --git a/app/api/v1/models/and.py b/app/api/v1/models/and.py
new file mode 100644
index 0000000..a126d4e
--- /dev/null
+++ b/app/api/v1/models/and.py
@@ -0,0 +1,41 @@
+Here's the `and.py` file with the `And` model for the `blog_app` application:
+
+```python
+# app/api/v1/models/and.py
+
+from sqlalchemy import Column, ForeignKey, Integer, String
+from sqlalchemy.orm import relationship
+
+from app.api.db.database import Base
+
+class And(Base):
+    __tablename__ = "ands"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, nullable=False)
+    content = Column(String, nullable=False)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+
+    author = relationship("User", back_populates="ands")
+
+    def __repr__(self):
+        return f"And(id={self.id}, title='{self.title}', content='{self.content[:20]}...', user_id={self.user_id})"
+```
+
+Explanation:
+
+1. We import the necessary modules from SQLAlchemy: `Column`, `ForeignKey`, `Integer`, `String`, and `relationship`.
+2. We import the `Base` class from `app.api.db.database`, which represents the base class for all SQLAlchemy models in this project.
+3. We define the `And` class, which inherits from the `Base` class.
+4. The `__tablename__` attribute specifies the name of the database table associated with this model.
+5. We define the following columns for the `And` model:
+   - `id`: An integer primary key column with an index.
+   - `title`: A non-nullable string column for the and title.
+   - `content`: A non-nullable string column for the and content.
+   - `user_id`: A non-nullable integer column that represents a foreign key referencing the `users` table.
+6. We define a relationship between the `And` model and the `User` model using the `relationship` function from SQLAlchemy. This relationship is named `author` and is back-populated with the `ands` attribute on the `User` model.
+7. We define the `__repr__` method to provide a string representation of the `And` instance, which can be useful for debugging and logging purposes.
+
+This model assumes that there is a `User` model defined elsewhere in the project, and that the `users` table exists in the database. The `And` model represents a blog and or article, where each and is associated with a specific user (author).
+
+When you create instances of the `And` model and add them to the database session, SQLAlchemy will automatically handle the creation of the `ands` table in the database, as well as the management of the foreign key relationship with the `users` table.
\ No newline at end of file
diff --git a/app/api/v1/models/comments.py b/app/api/v1/models/comments.py
new file mode 100644
index 0000000..5d2fc0c
--- /dev/null
+++ b/app/api/v1/models/comments.py
@@ -0,0 +1,44 @@
+Here's the `comments.py` file with the `Comments` model for the `blog_app` app:
+
+```python
+# app/api/v1/models/comments.py
+
+from sqlalchemy import Column, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import relationship
+
+from app.api.db.database import Base
+
+class Comments(Base):
+    __tablename__ = "comments"
+
+    id = Column(Integer, primary_key=True, index=True)
+    post_id = Column(Integer, ForeignKey("posts.id"), nullable=False)
+    author_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    content = Column(Text, nullable=False)
+    created_at = Column(String, nullable=False)
+    updated_at = Column(String, nullable=True)
+
+    post = relationship("Posts", back_populates="comments")
+    author = relationship("Users", back_populates="comments")
+
+    def __repr__(self):
+        return f"Comment(id={self.id}, post_id={self.post_id}, author_id={self.author_id}, content='{self.content}', created_at='{self.created_at}', updated_at='{self.updated_at}')"
+```
+
+Explanation:
+
+1. We import the necessary modules from SQLAlchemy, including `Column`, `ForeignKey`, `Integer`, `String`, `Text`, and `relationship`.
+2. We also import `Base` from `app.api.db.database`, which is assumed to be the base class for SQLAlchemy models in this project.
+3. The `Comments` class inherits from `Base` and defines the following columns:
+   - `id`: Primary key and index for the table.
+   - `post_id`: Foreign key referencing the `id` column of the `posts` table.
+   - `author_id`: Foreign key referencing the `id` column of the `users` table.
+   - `content`: Text content of the comment.
+   - `created_at`: String representing the creation timestamp of the comment.
+   - `updated_at`: String representing the last update timestamp of the comment (nullable).
+4. We define two relationships:
+   - `post`: A relationship with the `Posts` model, back-populating the `comments` attribute.
+   - `author`: A relationship with the `Users` model, back-populating the `comments` attribute.
+5. The `__repr__` method is defined to provide a string representation of the `Comments` object.
+
+Note: This model assumes the existence of `Posts` and `Users` models, which should be defined in separate files. Additionally, the `app.api.db.database` module should provide the `Base` class, which is typically defined using the SQLAlchemy declarative base.
\ No newline at end of file
diff --git a/app/api/v1/models/posts.py b/app/api/v1/models/posts.py
new file mode 100644
index 0000000..4547538
--- /dev/null
+++ b/app/api/v1/models/posts.py
@@ -0,0 +1,32 @@
+Here's the `posts.py` file with the `Posts` model for the `blog_app` application:
+
+```python
+# app/api/v1/models/posts.py
+
+from sqlalchemy import Column, Integer, String, Text, ForeignKey
+from sqlalchemy.orm import relationship
+from app.api.db.database import Base
+
+class Posts(Base):
+    __tablename__ = "posts"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String, nullable=False)
+    content = Column(Text, nullable=False)
+    author_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+
+    author = relationship("Users", back_populates="posts")
+```
+
+This model defines the `Posts` table with the following fields:
+
+- `id`: An auto-incrementing primary key for the post.
+- `title`: A non-nullable string field for the post title.
+- `content`: A non-nullable text field for the post content.
+- `author_id`: A non-nullable foreign key referencing the `id` of the `Users` table, representing the author of the post.
+
+The `author` field is a relationship to the `Users` model, which allows accessing the author information from a post object. The `back_populates` parameter ensures that the relationship is bi-directional, allowing access to the associated posts from a user object.
+
+Note that this model assumes the existence of a `Users` model, which should be defined in a separate file (e.g., `users.py`). The `Base` class is imported from `app.api.db.database`, which is a common pattern in FastAPI projects using SQLAlchemy and SQLite.
+
+Make sure to import any necessary modules (e.g., `sqlalchemy`) in your project and configure the database connection properly.
\ No newline at end of file
diff --git a/app/api/v1/models/user.py b/app/api/v1/models/user.py
new file mode 100644
index 0000000..5563bf4
--- /dev/null
+++ b/app/api/v1/models/user.py
@@ -0,0 +1,40 @@
+Here's the `user.py` file with the `User` model for the `blog_app` app:
+
+```python
+# app/api/v1/models/user.py
+
+from sqlalchemy import Column, Integer, String, Boolean
+from app.api.db.database import Base
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String, unique=True, index=True)
+    email = Column(String, unique=True, index=True)
+    password = Column(String)
+    is_active = Column(Boolean, default=True)
+    is_admin = Column(Boolean, default=False)
+
+    def __repr__(self):
+        return f"User(id={self.id}, username='{self.username}', email='{self.email}', is_active={self.is_active}, is_admin={self.is_admin})"
+```
+
+Explanation:
+
+1. We import the necessary modules from SQLAlchemy: `Column`, `Integer`, `String`, and `Boolean`.
+2. We import the `Base` class from `app.api.db.database`, which is the base class for all SQLAlchemy models in the project.
+3. We define the `User` class, which inherits from `Base`.
+4. We set the `__tablename__` attribute to `"users"`, which will be the name of the table in the database.
+5. We define the following columns for the `User` model:
+   - `id`: An integer primary key and index column.
+   - `username`: A string column that is unique and indexed.
+   - `email`: A string column that is unique and indexed.
+   - `password`: A string column for storing the user's password.
+   - `is_active`: A boolean column that indicates whether the user account is active or not, defaulting to `True`.
+   - `is_admin`: A boolean column that indicates whether the user has admin privileges or not, defaulting to `False`.
+6. We define the `__repr__` method to provide a string representation of the `User` object, which is useful for debugging and logging purposes.
+
+This `User` model can be used in the FastAPI backend to handle user authentication, registration, and other user-related operations in the `blog_app` app.
+
+Note: Make sure to import this model in the appropriate places and create the necessary database tables using Alembic migrations or other methods provided by SQLAlchemy.
\ No newline at end of file
diff --git a/app/api/v1/routes/__init__.py b/app/api/v1/routes/__init__.py
index e69de29..c616cde 100644
--- a/app/api/v1/routes/__init__.py
+++ b/app/api/v1/routes/__init__.py
@@ -0,0 +1,27 @@
+Here's the `routes/__init__.py` file for the FastAPI backend:
+
+```python
+from fastapi import APIRouter
+
+from .and import router as and_router
+from .user import router as user_router
+from .posts import router as posts_router
+from .comments import router as comments_router
+
+api_router = APIRouter()
+
+api_router.include_router(and_router, prefix="/ands", tags=["ands"])
+api_router.include_router(user_router, prefix="/users", tags=["users"])
+api_router.include_router(posts_router, prefix="/posts", tags=["posts"])
+api_router.include_router(comments_router, prefix="/comments", tags=["comments"])
+```
+
+This file creates a main `APIRouter` instance `api_router` and includes the routers from `and.py`, `user.py`, `posts.py`, and `comments.py` with their respective prefixes and tags.
+
+The prefixes are set to `/ands`, `/users`, `/posts`, and `/comments`, respectively, ensuring that the routes defined in each router file are accessible under the corresponding URL path.
+
+The tags are set to `["ands"]`, `["users"]`, `["posts"]`, and `["comments"]`, respectively. These tags are used for grouping and organizing the API endpoints in the interactive documentation (e.g., Swagger UI or ReDoc).
+
+Make sure to import the necessary router instances from the corresponding files (`and.py`, `user.py`, `posts.py`, and `comments.py`) and include them in the main `api_router` using the `include_router` method.
+
+This file should be placed in the `app/api/v1/routes/` directory, as specified in the project structure.
\ No newline at end of file
diff --git a/app/api/v1/routes/and.py b/app/api/v1/routes/and.py
new file mode 100644
index 0000000..51c5dc1
--- /dev/null
+++ b/app/api/v1/routes/and.py
@@ -0,0 +1,43 @@
+Here's the `and.py` file for the `app/api/v1/routes/` directory with the specified endpoints:
+
+```python
+from typing import List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.api.v1.models.and import And
+from app.api.v1.schemas.and import AndCreate, AndResponse
+from app.api.core.dependencies.dependencies import get_db
+
+router = APIRouter()
+
+@router.get("/ands", response_model=List[AndResponse])
+def read_ands(db: Session = Depends(get_db)):
+    ands = db.query(And).all()
+    return ands
+
+@router.post("/ands", response_model=AndResponse)
+def create_and(and_data: AndCreate, db: Session = Depends(get_db)):
+    and_db = And(**and_data.dict())
+    db.add(and_db)
+    db.commit()
+    db.refresh(and_db)
+    return and_db
+
+@router.get("/ands/{id}", response_model=AndResponse)
+def read_and(id: int, db: Session = Depends(get_db)):
+    and_db = db.query(And).get(id)
+    if not and_db:
+        raise HTTPException(status_code=404, detail="And not found")
+    return and_db
+```
+
+Explanation:
+
+1. We import the necessary modules and classes from FastAPI, SQLAlchemy, and the project's models and schemas.
+2. We create an instance of `APIRouter` to define our routes.
+3. The `read_ands` function handles the `GET /ands` endpoint. It uses the `get_db` dependency to obtain a database session, queries all `And` objects from the database, and returns them as a list of `AndResponse` objects.
+4. The `create_and` function handles the `POST /ands` endpoint. It takes an `AndCreate` object as input, creates a new `And` object from the data, adds it to the database session, commits the changes, and returns the newly created `And` object as an `AndResponse`.
+5. The `read_and` function handles the `GET /ands/{id}` endpoint. It takes an `id` parameter, queries the database for an `And` object with the given ID, and returns it as an `AndResponse`. If no `And` object is found, it raises an `HTTPException` with a 404 status code.
+
+Note: This code assumes that you have defined the `And` model in `app.api.v1.models.and` and the `AndCreate` and `AndResponse` schemas in `app.api.v1.schemas.and`. Additionally, the `get_db` dependency function should be defined in `app.api.core.dependencies.dependencies`.
\ No newline at end of file
diff --git a/app/api/v1/routes/comments.py b/app/api/v1/routes/comments.py
new file mode 100644
index 0000000..e53333a
--- /dev/null
+++ b/app/api/v1/routes/comments.py
@@ -0,0 +1,44 @@
+Here's the 'comments.py' router file with the specified endpoints:
+
+```python
+from typing import List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.api.v1.models.comments import Comments
+from app.api.v1.schemas.comments import CommentsCreate, CommentsResponse
+from app.api.core.dependencies.dependencies import get_db
+
+router = APIRouter()
+
+@router.get("/commentss", response_model=List[CommentsResponse])
+def read_commentss(db: Session = Depends(get_db)):
+    commentss = db.query(Comments).all()
+    return commentss
+
+@router.post("/commentss", response_model=CommentsResponse)
+def create_comments(comments: CommentsCreate, db: Session = Depends(get_db)):
+    db_comments = Comments(**comments.dict())
+    db.add(db_comments)
+    db.commit()
+    db.refresh(db_comments)
+    return db_comments
+
+@router.get("/commentss/{id}", response_model=CommentsResponse)
+def read_comments(id: int, db: Session = Depends(get_db)):
+    comments = db.query(Comments).filter(Comments.id == id).first()
+    if not comments:
+        raise HTTPException(status_code=404, detail="Comments not found")
+    return comments
+```
+
+Explanation:
+
+1. We import the necessary modules and dependencies.
+2. We create an instance of `APIRouter` for our comments routes.
+3. The `read_commentss` function handles the `GET /commentss` endpoint. It fetches all comments from the database using `db.query(Comments).all()` and returns them as a list of `CommentsResponse` models.
+4. The `create_comments` function handles the `POST /commentss` endpoint. It creates a new comments instance from the provided `CommentsCreate` schema, adds it to the database, commits the changes, and returns the newly created comments as a `CommentsResponse` model.
+5. The `read_comments` function handles the `GET /commentss/{id}` endpoint. It fetches a comments by its ID using `db.query(Comments).filter(Comments.id == id).first()`. If the comments is not found, it raises an `HTTPException` with a 404 status code. Otherwise, it returns the comments as a `CommentsResponse` model.
+6. All database operations are performed using the `get_db` dependency, which provides a database session.
+
+Note: This code assumes that you have defined the `Comments` model in `app.api.v1.models.comments` and the `CommentsCreate` and `CommentsResponse` schemas in `app.api.v1.schemas.comments`.
\ No newline at end of file
diff --git a/app/api/v1/routes/posts.py b/app/api/v1/routes/posts.py
new file mode 100644
index 0000000..92941e5
--- /dev/null
+++ b/app/api/v1/routes/posts.py
@@ -0,0 +1,44 @@
+# app/api/v1/routes/posts.py
+
+from typing import List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.api.v1.models.posts import Posts
+from app.api.v1.schemas.posts import PostsCreate, PostsResponse
+from app.api.core.dependencies.dependencies import get_db
+
+router = APIRouter()
+
+@router.get("/postss", response_model=List[PostsResponse])
+def get_postss(db: Session = Depends(get_db)):
+    postss = db.query(Posts).all()
+    return postss
+
+@router.post("/postss", response_model=PostsResponse)
+def create_posts(posts: PostsCreate, db: Session = Depends(get_db)):
+    db_posts = Posts(**posts.dict())
+    db.add(db_posts)
+    db.commit()
+    db.refresh(db_posts)
+    return db_posts
+
+@router.get("/postss/{id}", response_model=PostsResponse)
+def get_posts(id: int, db: Session = Depends(get_db)):
+    db_posts = db.query(Posts).filter(Posts.id == id).first()
+    if not db_posts:
+        raise HTTPException(status_code=404, detail="Posts not found")
+    return db_posts
+```
+
+This code defines a FastAPI router with three endpoints:
+
+1. `GET /postss`: Lists all posts from the database. It uses the `Posts` model from `app.api.v1.models.posts` and returns a list of `PostsResponse` schemas from `app.api.v1.schemas.posts`.
+
+2. `POST /postss`: Creates a new post in the database. It accepts a `PostsCreate` schema from `app.api.v1.schemas.posts` as the request body, creates a new `Posts` model instance, adds it to the database, and returns the created `PostsResponse` schema.
+
+3. `GET /postss/{id}`: Retrieves a specific post by ID from the database. It uses the `Posts` model from `app.api.v1.models.posts` and returns a `PostsResponse` schema from `app.api.v1.schemas.posts`. If the post with the given ID is not found, it raises an `HTTPException` with a 404 status code.
+
+All the endpoints use the `get_db` dependency from `app.api.core.dependencies.dependencies` to obtain a database session.
+
+Note: This code assumes that the `Posts` model, `PostsCreate` schema, and `PostsResponse` schema exist in the specified locations. You may need to create or modify these files based on your project's requirements.
\ No newline at end of file
diff --git a/app/api/v1/routes/user.py b/app/api/v1/routes/user.py
new file mode 100644
index 0000000..d4d41a4
--- /dev/null
+++ b/app/api/v1/routes/user.py
@@ -0,0 +1,44 @@
+Here's the `user.py` file for the specified routes:
+
+```python
+from typing import List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.api.v1.models.user import User
+from app.api.v1.schemas.user import UserCreate, UserResponse
+from app.api.core.dependencies.dependencies import get_db
+
+router = APIRouter()
+
+@router.get("/users", response_model=List[UserResponse])
+def read_users(db: Session = Depends(get_db)):
+    users = db.query(User).all()
+    return users
+
+@router.post("/users", response_model=UserResponse)
+def create_user(user: UserCreate, db: Session = Depends(get_db)):
+    db_user = User(**user.dict())
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
+
+@router.get("/users/{user_id}", response_model=UserResponse)
+def read_user(user_id: int, db: Session = Depends(get_db)):
+    db_user = db.query(User).filter(User.id == user_id).first()
+    if not db_user:
+        raise HTTPException(status_code=404, detail="User not found")
+    return db_user
+```
+
+Explanation:
+
+1. We import the necessary modules and dependencies.
+2. We create an instance of `APIRouter` to define the routes.
+3. The `read_users` function handles the `GET /users` route. It fetches all users from the database using `db.query(User).all()` and returns them as a list of `UserResponse` models.
+4. The `create_user` function handles the `POST /users` route. It takes a `UserCreate` model as input, creates a new `User` instance from the input data, adds it to the database session, commits the changes, and returns the newly created user as a `UserResponse` model.
+5. The `read_user` function handles the `GET /users/{user_id}` route. It fetches a user from the database based on the provided `user_id`. If the user is not found, it raises an `HTTPException` with a 404 status code. Otherwise, it returns the user as a `UserResponse` model.
+6. All routes use the `get_db` dependency to obtain a database session.
+
+Note: This code assumes that you have defined the `User` model in `app.api.v1.models.user` and the `UserCreate` and `UserResponse` schemas in `app.api.v1.schemas.user`. Additionally, the `get_db` dependency should be defined in `app.api.core.dependencies.dependencies`.
\ No newline at end of file
diff --git a/app/api/v1/schemas/and.py b/app/api/v1/schemas/and.py
new file mode 100644
index 0000000..e9e8784
--- /dev/null
+++ b/app/api/v1/schemas/and.py
@@ -0,0 +1,36 @@
+Here's the `and.py` file with the `AndCreate` and `And` schemas for the `blog_app` application:
+
+```python
+# app/api/v1/schemas/and.py
+
+from typing import Optional
+from pydantic import BaseModel
+
+# AndBase schema
+class AndBase(BaseModel):
+    name: str
+    description: Optional[str] = None
+
+# AndCreate schema for creating a new "and" instance
+class AndCreate(AndBase):
+    pass
+
+# And schema for reading "and" instances
+class And(AndBase):
+    id: int
+    name: str
+    description: Optional[str] = None
+
+    class Config:
+        orm_mode = True
+```
+
+Explanation:
+
+1. We import the necessary modules: `typing` for type hints, and `pydantic` for defining data models.
+2. `AndBase` is a base Pydantic model that defines the common fields for both `AndCreate` and `And` schemas. It has two fields: `name` (required) and `description` (optional).
+3. `AndCreate` inherits from `AndBase` and represents the schema for creating a new "and" instance. It doesn't add any additional fields.
+4. `And` inherits from `AndBase` and represents the schema for reading "and" instances. It adds an `id` field, which is typically the primary key in the database.
+5. In the `And` model, we set `orm_mode = True` in the `Config` class. This allows Pydantic to work with ORM objects (e.g., SQLAlchemy models) and automatically convert them to Pydantic models.
+
+This file can be used in your FastAPI application to define request and response models for the "and" entity in the `blog_app` context. You can import these models in your API routes and use them for data validation, serialization, and deserialization.
\ No newline at end of file
diff --git a/app/api/v1/schemas/comments.py b/app/api/v1/schemas/comments.py
new file mode 100644
index 0000000..660b558
--- /dev/null
+++ b/app/api/v1/schemas/comments.py
@@ -0,0 +1,41 @@
+Ensure all necessary imports and dependencies are included, maintaining consistency with a FastAPI project structure using SQLite and SQLAlchemy.
+
+Here's the 'comments.py' file with the requested schemas:
+
+```python
+# app/api/v1/schemas/comments.py
+
+from typing import Optional
+from pydantic import BaseModel
+from datetime import datetime
+
+# CommentsCreate schema for creating a new comment
+class CommentsCreate(BaseModel):
+    content: str
+    post_id: int
+    user_id: int
+
+# Comments schema for reading/returning comments
+class Comments(BaseModel):
+    id: int
+    content: str
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+    post_id: int
+    user_id: int
+
+    class Config:
+        orm_mode = True
+```
+
+Explanation:
+
+1. The necessary imports are included: `typing` for type hints, `pydantic` for defining the schemas, and `datetime` for handling date and time fields.
+
+2. The `CommentsCreate` schema is defined with fields `content` (str), `post_id` (int), and `user_id` (int). This schema will be used for creating new comments.
+
+3. The `Comments` schema is defined with fields `id` (int), `content` (str), `created_at` (datetime), `updated_at` (Optional[datetime]), `post_id` (int), and `user_id` (int). This schema will be used for reading and returning comments.
+
+4. The `orm_mode = True` configuration is set in the `Comments` schema, which tells Pydantic to read data from SQLAlchemy ORM models.
+
+Note: This file assumes that the `comments` table in the database has columns corresponding to the defined fields in the schemas. If the table structure is different, the schemas should be adjusted accordingly.
\ No newline at end of file
diff --git a/app/api/v1/schemas/posts.py b/app/api/v1/schemas/posts.py
new file mode 100644
index 0000000..9587006
--- /dev/null
+++ b/app/api/v1/schemas/posts.py
@@ -0,0 +1,41 @@
+Here's the `posts.py` file with the `PostsCreate` and `Posts` schemas for the `blog_app`:
+
+```python
+# app/api/v1/schemas/posts.py
+
+from typing import Optional
+from pydantic import BaseModel
+from datetime import datetime
+
+class PostsCreate(BaseModel):
+    title: str
+    content: str
+    published: bool = False
+
+class Posts(BaseModel):
+    id: int
+    title: str
+    content: str
+    published: bool
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        orm_mode = True
+```
+
+Explanation:
+
+1. The `PostsCreate` schema defines the fields required for creating a new post. It includes `title`, `content`, and an optional `published` field with a default value of `False`.
+
+2. The `Posts` schema defines the fields for representing a post in the database. It includes `id`, `title`, `content`, `published`, `created_at`, and an optional `updated_at` field.
+
+3. The `orm_mode = True` is set in the `Config` class of the `Posts` schema to allow Pydantic to automatically convert data from ORM objects (e.g., SQLAlchemy models) to Pydantic models and vice versa.
+
+4. The `Optional` type from the `typing` module is used for the `updated_at` field, indicating that it can be `None`.
+
+5. The `datetime` type is imported from the `datetime` module to represent the `created_at` and `updated_at` fields.
+
+This file should be placed in the `app/api/v1/schemas/` directory, following the typical FastAPI project structure.
+
+Make sure to install the required dependencies (`pydantic` and `typing`) in your project environment if they are not installed already.
\ No newline at end of file
diff --git a/app/api/v1/schemas/user.py b/app/api/v1/schemas/user.py
new file mode 100644
index 0000000..856f1c0
--- /dev/null
+++ b/app/api/v1/schemas/user.py
@@ -0,0 +1,45 @@
+Ensure all necessary imports and dependencies are included, maintaining consistency with a FastAPI project structure using SQLite and SQLAlchemy.
+
+Here's the `user.py` file for the `app/api/v1/schemas/` directory:
+
+```python
+from typing import Optional
+from pydantic import BaseModel, EmailStr
+
+# User Schema for Pydantic Model
+class UserBase(BaseModel):
+    email: EmailStr
+    is_active: Optional[bool] = True
+    is_superuser: bool = False
+    full_name: Optional[str] = None
+
+# Properties to receive via API on creation
+class UserCreate(UserBase):
+    email: EmailStr
+    password: str
+
+# Properties to receive via API on update
+class UserUpdate(UserBase):
+    password: Optional[str] = None
+
+# Additional properties to return via API
+class User(UserBase):
+    id: int
+    
+    class Config:
+        orm_mode = True
+```
+
+Explanation:
+
+1. The `UserBase` class defines the common properties shared by all user schemas, including `email`, `is_active`, `is_superuser`, and `full_name`.
+
+2. The `UserCreate` class inherits from `UserBase` and adds the `password` field, which is required when creating a new user.
+
+3. The `UserUpdate` class also inherits from `UserBase` and includes an optional `password` field for updating an existing user's password.
+
+4. The `User` class inherits from `UserBase` and adds an `id` field, which is typically the primary key in the database. It also includes the `orm_mode = True` configuration to allow Pydantic to work with SQLAlchemy models.
+
+5. The necessary imports are included at the top of the file, including `typing` for type annotations, `pydantic` for defining the schemas, and `EmailStr` for email validation.
+
+This file defines the Pydantic schemas for the user model in the `blog_app` application, following the FastAPI project structure and using SQLite and SQLAlchemy for database operations.
\ No newline at end of file
diff --git a/main.py b/main.py
index dca5c44..6ba45fa 100644
--- a/main.py
+++ b/main.py
@@ -1,7 +1,66 @@
+import uvicorn
 from fastapi import FastAPI
+from starlette.middleware.cors import CORSMiddleware
 
-app = FastAPI(title="Generated Backend")
+from app.api.v1.routes import router as v1_router
+from app.api.core.middleware import activity_tracker
+from app.core.config import settings
+from app.db.base import Base
+from app.db.session import engine
 
-@app.get("/")
-def read_root():
-    return {"message": "Welcome to the generated backend"}
\ No newline at end of file
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    openapi_url=f"{settings.API_V1_STR}/openapi.json"
+)
+
+# Set all CORS enabled origins
+if settings.BACKEND_CORS_ORIGINS:
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+# Include activity tracker middleware
+app.middleware("http")(activity_tracker)
+
+# Include v1 router
+app.include_router(v1_router, prefix=settings.API_V1_STR)
+
+# Create database tables
+Base.metadata.create_all(bind=engine)
+
+if __name__ == "__main__":
+    uvicorn.run(app, host="0.0.0.0", port=8000)
+```
+
+This `main.py` file sets up the FastAPI application for the `blog_app` project. Here's a breakdown of what it does:
+
+1. Import necessary modules and dependencies.
+2. Create an instance of the `FastAPI` app with the project name and OpenAPI URL.
+3. Set up CORS middleware to allow cross-origin requests from specified origins.
+4. Include the `activity_tracker` middleware from `app.api.core.middleware`.
+5. Include the `v1_router` from `app.api.v1.routes` under the `/v1` prefix.
+6. Create database tables using SQLAlchemy's `Base.metadata.create_all` method, which connects to the SQLite database `blog_app.db` (assuming the database URL is configured correctly in `app.core.config`).
+7. If the script is run directly (not imported as a module), start the Uvicorn server on `0.0.0.0:8000`.
+
+Note that this code assumes the following project structure:
+
+```
+app/
+    api/
+        v1/
+            routes.py
+        core/
+            middleware.py
+    core/
+        config.py
+    db/
+        base.py
+        session.py
+main.py
+```
+
+You'll need to create these files and directories, and populate them with the necessary code for your application. Additionally, you'll need to install the required dependencies (e.g., `fastapi`, `uvicorn`, `sqlalchemy`) and configure the database URL in `app.core.config`.
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index a70e8ac..5fa6b12 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,8 @@
+Here's the `requirements.txt` file with the requested dependencies:
+
+```
 fastapi
 uvicorn
 sqlalchemy
-pydantic
\ No newline at end of file
+pydantic
+```
\ No newline at end of file