Implements support for token downscoping to allow for the creation of tokens with restricted permissions
Change-Id: I52459bdb0dfdd5e8d86e6043ba0362f4bf4b823c
GitHub-Last-Rev: 941cf10a8e
GitHub-Pull-Request: golang/oauth2#502
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/326529
Reviewed-by: Chris Broadfoot <cbro@golang.org>
Run-TryBot: Chris Broadfoot <cbro@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Tyler Bui-Palsulich <tbp@google.com>
Trust: Cody Oss <codyoss@google.com>