implemented basis of login, missing database connection.

app/__init__.py

@@ -1,18 +1,30 @@
 from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_login import LoginManager
+
+db = SQLAlchemy()
+login_manager = LoginManager()
 
 def create_app():
     app = Flask(__name__)
 
-    # Basic config
+    app.config["SQLALCHEMY_DATABASE_URI"] = ""
     app.config["SECRET_KEY"] = "dev-secret-key"
 
-    # # ---- Register Blueprints (Routes) ----
-    # from .routes.auth_routes import auth_bp
-    # from .routes.solver_routes import solver_bp
+    db.init_app(app)
+    login_manager.init_app(app)
+    login_manager.login_view = "login.login"
+
+    from .models.user import User
+
+    @login_manager.user_loader
+    def load_user(user_id):
+        return db.session.get(User, int(user_id))
+
+    from .routes.login_routes import login_bp
     from .routes.main_routes import main_bp
 
-    # app.register_blueprint(auth_bp)
-    # app.register_blueprint(solver_bp)
+    app.register_blueprint(login_bp)
     app.register_blueprint(main_bp)
 
     return app