Support custom parameters in RefreshToken call

[cpave3]

Describe the problem you'd like to have solved

We have a need to provide custom parameters to both the authorize and refreshToken calls so that we can use rules to add some derived data into our JWTs. authorize currently supports this by just adding the extra parameters to the call, but the refreshToken call seems to filter them out.

Describe the ideal solution

Ideally, I can submit a PR to either add an extra argument to the refresh token call to allow custom parameters, or skip the argument and just make that the default behaviour if it won't break anything. The main thing here is that I'd like to check if this is an acceptable solution that would be likely to get merged in. If so, I am happy to make the change.

Alternatives and current work-arounds

If we make the call manually, with the custom parameters included in the POST body, it works as desired

[lbalmaceda]

@cpave3 Thanks for raising this and for checking first, it's a valid request. I think you could achieve that similarly to how it's done in the authorizeUrl method, using this property .

Happy to review a PR once you have it 👍

[cpave3]

@lbalmaceda I've made the change and submitted the PR. Please let me know if you need anything else from my side 🙏 Thank you.

[lbalmaceda]

Merged!