AWS released a new instance metadata service (IMDSv2). IMDSv2 brought a requirement that a session token header is now required on every call to metadata endpoint.
Modify the AWS credential retrieval flow to fetch the session token and send it along with the calls to metadata endpoints
Change-Id: I539912ab38f5e591658b29a1e7a99d2b828a1128
GitHub-Last-Rev: 29e1f4aad1
GitHub-Pull-Request: golang/oauth2#554
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/390794
Reviewed-by: Cody Oss <codyoss@google.com>
Trust: Cody Oss <codyoss@google.com>
Run-TryBot: Cody Oss <codyoss@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Leo Siracusa <leosiracusa@google.com>
Trust: Tyler Bui-Palsulich <tbp@google.com>