Allow moderators' OAuths to work with polls and predictions API endpoints
At the moment, only the broadcaster is allowed to use the polls and predictions endpoints because the broadcaster id must match the OAuth token. I think that allowing moderators of the specific channel should also be able to use these endpoints. This would be really helpful for Chatterino for example. In order for moderators to create polls or predictions, they have to go to the actual chat on the website to type in /prediction or /poll. If moderators were able to access the endpoint, Chatterino could easily add a command to bring up a window to create a poll or prediction and complete a prediction.