feat: adds service account impersonation to `google.auth.external_account.Credentials`#605

Merged

busunkim96 merged 7 commits intogoogleapis:byoidfrom

bojeil-google:external-account-impersonation

Sep 18, 2020

Commits on Sep 2, 2020

refactor: split 'with_quota_project' into separate base class (#561)

busunkim96
and
tseaver
authored

Commits on Sep 3, 2020

Commits on Sep 8, 2020

fix: migrate signBlob to iamcredentials.googleapis.com (#600)
busunkim96
authored

Commits on Sep 15, 2020