Address pycodestyle complaints with tests

server/tests/api/test_authentication_api.py

@@ -11,8 +11,8 @@ def test_bump_happy_path(auth: AuthActions):
     auth.login()
     result = auth.bump()
     assert result.status_code == 200
-    assert result.json['last_login_time'] is not None \
-           and len(result.json['last_login_time']) > 0
+    assert (result.json['last_login_time'] is not None
+            and len(result.json['last_login_time']) > 0)
 
 
 def test_logout_happy_path(auth: AuthActions):