feat: support scopes for metadata credentials on GCF/Cloud Run/App Engine#376

Closed

sqrrrl wants to merge 4 commits intogoogleapis:masterfrom

Commits on Feb 1, 2019

Commits on Mar 29, 2019

Updating docs, making scopes a tuple not an array
asciimike
committed

Commits on Oct 22, 2019

Resolve merge conflicts, slightly refactor to preserve existing behavior
sqrrrl
committed