fix logic for roles

areas/roles/role_service.py

@@ -9,9 +9,4 @@ class RoleService:
 
     @staticmethod
     def get_role_by_id(role_id):
-        if role_id is None:
-            role = Role()
-            role.name = 'user'
-            return role
-        
         return Role.query.filter_by(id=role_id).first()

web/login/login.py

@@ -262,9 +262,11 @@ def consent():
             .filter(AppRole.user_id == user.uuid)
         )
         for role_obj in role_objects:
-            role_name = RoleService.get_role_by_id(role_obj.role_id).name
-            if (role_name is not None):
-                roles.append(role_name)
+            app_role = RoleService.get_role_by_id(role_obj.role_id)
+            if (app_role is None):
+                roles.append('user')
+                continue
+            roles.append(app_role.name)
 
     current_app.logger.info(f"Using '{roles}' when applying consent for {kratos_id}")