Check for member in application function, not user function

atst/domain/environment_roles.py

@@ -7,7 +7,7 @@ from atst.models import EnvironmentRole
 class EnvironmentRoles(object):
     @classmethod
     def create(cls, user, environment, role):
-        if user.is_app_member(environment.application):
+        if environment.application.has_member(user):
             env_role = EnvironmentRole(user=user, environment=environment, role=role)
             if not user.cloud_id:
                 user.cloud_id = app.csp.cloud.create_user(user)

atst/domain/environments.py

@@ -68,7 +68,7 @@ class Environments(object):
     def update_env_role(cls, environment, user, new_role):
         updated = False
 
-        if user.is_app_member(environment.application):
+        if environment.application.has_member(user):
             if new_role is None:
                 updated = EnvironmentRoles.delete(user.id, environment.id)
             else: