(feaet): Refactor auth routes to use UserService

services/user.py

@@ -1,13 +1,21 @@
-from werkzeug.security import generate_password_hash, check_password_hash
 from models.user import User, db
+from werkzeug.security import generate_password_hash, check_password_hash
 
 class UserService:
     def create_user(self, username, password):
+        if not username or not password:
+            return jsonify({"error": "Username and password are required"}), 400
+        
+        if len(username) < 3 or len(password) < 8:
+            return jsonify({"error": "Username must be at least 3 characters and password must be at least 8 characters."}), 400
+
+        
         existing_user = User.query.filter_by(username=username).first()
         if existing_user:
             raise ValueError("User already exists")
         
-        new_user = User(username=username, password=password)
+        hashed_password = generate_password_hash(password)
+        new_user = User(username=username, password=hashed_password)
         db.session.add(new_user)
         db.session.commit()
         return new_user