feat: Add Pluggable auth support#988

Merged

arithmetic1728 merged 8 commits intogoogleapis:pluggablefrom

renkelvin:pluggable

Mar 1, 2022

Commits on Feb 16, 2022

Port identity pool credentials
Chuan Ren
committed

Commits on Feb 24, 2022

access_token retrieved
Chuan Ren
committed

Commits on Feb 25, 2022

-> pluggable
Chuan Ren
committed
Update pluggable.py
Chuan Ren
committed
Create test_pluggable.py
Chuan Ren
committed
Unit tests
Chuan Ren
committed
Merge branch 'main' into pluggable
Chuan Ren
authored

Commits on Mar 1, 2022

Address pr issues
Chuan Ren
committed