fix: configure_auth gets region from REGION env var (#596)
fix: configure_auth gets region from REGION env var (#596)

Co-authored-by: Roger Martinez <6696d8e646958188ceb3ec211e8905a3a5e2dd81@gmail.com>
Co-authored-by: Roger Martinez <9e65e8f480149a20aecc504922a2ebf5b35c377a@users.noreply.github.com>
Co-authored-by: Ace Nassri <66a75941ededf131c26806c52c2b5e1fb48aad03@google.com>
Co-authored-by: Charles Engelke <2f8855ae1777b7825ea5c6a2e808e18e09aa7e61@google.com>
GoogleCloudPlatform/emblem,GoogleCloudPlatform/emblem,GoogleCloudPlatform/emblem,GoogleCloudPlatform/emblem