Change provider config dynamically within the backend
From what I understand, is that you can override provider configuration by posting a form to an override route. 

I need to override the provider config, but this is not controlled from a form. I have a database that contains keys and secrets. I want to override provider configurations within my backend application, by doing a query to my database to get the `key` and `secret` from a provider.

I achieved this by putting in a callback that is called when a connect is done (not a very elegant solution though):
https://gist.github.com/arjanfrans/71c180e7b3274545e2a500b2f8db2233#file-express-js-L10
https://gist.github.com/arjanfrans/71c180e7b3274545e2a500b2f8db2233#file-express-js-L71

Inside this callback I do my database query and then override the config with my `key` and `secret` added.

I basically need the dynamic override ride, without the form part. Is what I am trying to achieve possible with the current version of Grant?
