.

app/models.py

@@ -1,5 +1,6 @@
 from werkzeug.security import generate_password_hash, check_password_hash
 from flask_login import UserMixin
+from app import login
 
 
 class User(UserMixin):
@@ -8,3 +9,8 @@ class User(UserMixin):
 
     def check_password(self, password):
         return check_password_hash(self.password_hash, password)
+
+
+@login.user_loader
+def load_user(id):
+    return 0