Fix a bug in setup script, so non-env-var config won't throw errors.
Fix a bug in setup script, so non-env-var config won't throw errors.

PiperOrigin-RevId: 213319995

GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare