Allow for permissions to be set in auth requests

[gillyhl]

Sets the permissions in the auth request body when creating an auth request.

[gillyhl]

It looks good but could we also allow passing permissions for the following methods:

• https://github.com/moneyhub/moneyhub-api-client#getauthorizeurlforcreateduser https://github.com/moneyhub/moneyhub-api-client#getauthorizeurl

Are we able to let the permissions just be part of the claims object they set in the method? Or do we want them to pass in permissions as a separate argument and we include it in the claims for them?

[ozamarripa]

I think that it would be good to have an optional parameter that will include the permissions in the claims object if provided, api clients will always have the option to pass the whole claims object if needed