Add scope to refresh_token

[criles25]

Changes

Adding scope param to refresh_token.

References

The auth0 API supports the scope param when refreshing token. https://auth0.com/docs/api/authentication#refresh-token

Testing

• This change adds unit test coverage

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors

[lbalmaceda]

Thanks, the addition is correct 👍 left a comment

[lbalmaceda]

I believe this will be a breaking change for those calling it without named arguments. We should place the new value on the last place.

[criles25]

the empty string default scope='' behaves the same as it being left out when calling the auth0 API

# scope=""
charlesriley@Charless-MBP auth0-python % curl --request POST \                                                                    
--url 'https://xometry-monolith-development.us.auth0.com/oauth/token' \
--header 'content-type: application/x-www-form-urlencoded' \
--data 'grant_type=refresh_token&client_id=foo&client_secret=bar&scope=""&refresh_token=baz'
{"access_token":"JWT","scope":"offline_access","expires_in":86400,"token_type":"Bearer"}%                                                                 

# scope left out 
charlesriley@Charless-MBP auth0-python % curl --request POST \                                                                    
--url 'https://xometry-monolith-development.us.auth0.com/oauth/token' \
--header 'content-type: application/x-www-form-urlencoded' \
--data 'grant_type=refresh_token&client_id=foo&client_secret=bar&refresh_token=baz' 
{"access_token":"JWT","scope":"offline_access","expires_in":86400,"token_type":"Bearer"}%