Methods for OAuth flow

[koenpunt]

It would be nice to have methods for the oauth authorize and token urls, constructed with the client id and secret.

https://login.uber.com/oauth/v2/authorize

https://login.uber.com/oauth/v2/token

[milesmatthias]

Am implementing this... ⛵

[chrisenytc]

I have made a tool for help create access tokens while developing something with the uber api. http://github.com/chrisenytc/ubauth