feat: Update endpoint login

app/api/endpoints/login.py

@@ -1,7 +1,13 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
 
 router = APIRouter()
 
-@router.post("/login")
-async def login(username: str, password: str):
-    return {"message": "User logged in successfully", "username": username}
+class UserRegistration(BaseModel):
+    username: str
+    password: str
+    email: str
+
+@router.post("/signup")
+async def signup(user: UserRegistration):
+    return {"message": "User registered successfully", "user": user.username}