update. added session token and user validity

services.py

@@ -47,6 +47,7 @@ def create_access_token(data: dict, expires_delta: datetime.timedelta = None):
         expire = datetime.datetime.utcnow() + datetime.timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
     to_encode.update({"exp": expire})
     encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    print("encoded jwt", encoded_jwt)
     return encoded_jwt
 
 # JWT token verification function
@@ -77,7 +78,8 @@ async def login_user(user: User):
         raise HTTPException(status_code=401, detail="Invalid credentials")
     # Create JWT token
     access_token = create_access_token(data={"sub": user.username})
-    return {"access_token": access_token}
+    print("access token", access_token)
+    return {"token": access_token}
 
 # API to validate the session token
 @app.get("/api/validate-token")
@@ -123,3 +125,11 @@ async def update_user(username: str, user: User):
         raise HTTPException(status_code=404, detail="User not found")
     USERS[username] = user.password
     return {"message": f"User {username} password updated successfully"}
+
+# New route to check if a user exists by username
+@app.get("/api/user-exists/{username}")
+async def user_exists(username: str):
+    """Check if a user exists based on the username."""
+    if username in USERS:
+        return {"message": f"User '{username}' exists"}
+    raise HTTPException(status_code=404, detail="User not found")