Can't use an alternative optionsProvider with ClientCredentials grant type

Does the approach outlined in 💬 OptionProvidor overruled Closed: works as designed not meet your needs?

Thanks for such a quick reply. Wow I can't believe I didn't think of just extending the ClientCredentialsOptionProvider. I think that will work, but I do think you could just check if the instance was League\OAuth2\Client\OptionProvider\OptionProviderInterface, that way you could use their classes as well. That said, I'll just extend the ClientCredentialsOptionProvider and that should do the trick.