I am switching a app over to AWS open source parse server but I am having problems with this code. 

```
 [Parse initializeWithConfiguration:[ParseClientConfiguration configurationWithBlock:^(id<ParseMutableClientConfiguration> configuration) {
    configuration.applicationId = @"App ID";
       configuration.clientKey = @"";
    configuration.server = @"my server URL";
  }]];

```

I do not have a Client key and it is crashing without one. If any one could help that would be great.