Add user via api

Leave original user object in for this slice. Remove on next

tests/conftest.py

@@ -142,3 +142,17 @@ def mock_delete_service(mocker, mock_get_service):
     mock_class = mocker.patch(
         'app.notifications_api_client.delete_service', side_effect=_delete)
     return mock_class
+
+
+@pytest.fixture(scope='function')
+def mock_register_user(mocker, user_data):
+    data = {
+        "email_address": user_data['email_address'],
+        "failed_login_count": 0,
+        "mobile_number": user_data['mobile_number'],
+        "name": user_data['name'],
+        "state": "pending"
+    }
+    mock_class = mocker.patch('app.main.views.register.UserApiClient')
+    mock_class.register_user.return_value = data
+    return mock_class