feat: Update endpoint login

app/api/endpoints/login.py

@@ -1,7 +1,23 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+from typing import Optional
+from models import User
+from schemas import UserLogin, Token
+from utils import get_db, authenticate_user, create_access_token
 
 router = APIRouter()
 
-@router.post("/login")
-async def login(username: str, password: str):
-    return {"message": "User logged in successfully", "username": username}
+@router.post("/login", response_model=Token)
+async def login(user_credentials: UserLogin, db: Session = Depends(get_db)):
+    """
+    Authenticate user and return access token
+    """
+    user = authenticate_user(db, user_credentials.username, user_credentials.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    access_token = create_access_token(data={"sub": user.username})
+    return {"access_token": access_token, "token_type": "bearer"}