Fix auth string formatting

main.py

@@ -14,6 +14,7 @@ from google.cloud import storage
 # authenticate gcp
 gcp_sa_key = json.loads(os.environ.get('GCP_SA_KEY'))
 print(gcp_sa_key)
+print(gcp_sa_key.keys())
 client = storage.Client.from_service_account_info(gcp_sa_key)
 bucket = client.get_bucket('bmllc-marci-data-bucket')