Use user.id to check if user is in application

atst/models/application.py

@@ -9,7 +9,6 @@ from atst.models.application_role import (
     ApplicationRole,
     Status as ApplicationRoleStatuses,
 )
-
 from atst.database import db
 
 
@@ -52,8 +51,9 @@ class Application(
     def displayname(self):
         return self.name
 
-    def has_member(self, user):
-        return user in self.users
+    def has_member(self, user_id):
+        user_ids = set(str(user.id) for user in self.users)
+        return str(user_id) in user_ids
 
     def __repr__(self):  # pragma: no cover
         return "<Application(name='{}', description='{}', portfolio='{}', id='{}')>".format(