Delete second test user on teatdown

test/test_graphql.py

@@ -18,7 +18,7 @@ class GraphQlTests(LiveServerTestCase):
 
     def tearDown(self):
         # clean up tables
-        for username in ["graphqluser"]:
+        for username in ["graphqluser", "graphqluser2"]:
             user = db_session.query(User).filter_by(username=username).first()
             if user is not None:
                 user.roles = []