Expose token_from_user for use in tests

[marcqualie]

I'm currently integration tokenable into a rails app and want to write tests to check for valid vs invalid tokens and the responses.

Currently I can't find an easy way to generate a valid token for a user since the token_from_user method is inside the controller.

[scottrobertson]

Can't you just include Tokenable::Authable, and use the method?

[scottrobertson]

Does it make sense to move this to a user method instead maybe?