Allow Users to pass additional Parameters via function requestTemporaryCredentials

[Meternios]

I need to add some specific Params to my temporaryCredentials call, could you pls pass a Map<String, String> to the function besides the callback URL.

After allowing to pass additional Parameter the function call should look like this:
var test = await auth.requestTemporaryCredentials(redirectUrl, {'oauth_consumer_key': consumerKey});

[kaetemi]

Can you give the use case? That doesn't look quite right.
The consumer key and the private secret are already passed to ClientCredentials, Authorization, and therefore to requestTemporaryCredentials.

[kaetemi]

oauth_consumer_key is part of the OAuth header.