sdk: add oauthapi functions to golang interface

[androbi-com]

Do you want to request a feature or report a bug?

Complete SDK for Go

What is the current behavior?

In https://github.com/ory/hydra/blob/master/sdk/go/hydra/sdk_api.go the following functions from https://github.com/ory/hydra/blob/master/sdk/go/hydra/swagger/o_auth2_api.go do not show up:

• OauthAuth
• OauthToken
• RevokeAllUserConsentSessions
• RevokeAuthenticationSession
• RevokeUserClientConsentSessions
• RevokeUserLoginCookie
• Userinfo
• WellKnown

In the case of the first two I suppose this is intended. But the rest should probably be included? Also, "WellKnown" and the existing "GetWellKnown" are very similar names.

Which version of the software is affected?
latest

[aeneasr]

The /oauth2/auth and /oauth2/token endpoints should not be included. They have difficult parameters to handle which should be implemented via a proper library. The others could/should be added (except RevokeUserLoginCookie).