Putting replace call after DB URI load from vcap services

gdrive/settings.py

@@ -45,7 +45,8 @@
     if vcap_services:
         user_services = json.loads(vcap_services)["user-provided"]
         DB_URI = json.loads(vcap_services)["aws-rds"][0]["credentials"]["uri"]
-
+        #  Sqlalchemy requires 'postgresql' as the protocol
+        DB_URI = DB_URI.replace("postgres://", "postgresql://", 1)
         for service in user_services:
             if service["name"] == "gdrive":
                 log.info("Loading credentials from env var")
@@ -67,8 +68,3 @@
 except (json.JSONDecodeError, KeyError, FileNotFoundError) as err:
     log.warning("Unable to load credentials from VCAP_SERVICES")
     log.debug("Error: %s", str(err))
-
-
-if DB_URI is not None:
-    # Sqlalchemy requires 'postgresql' as the protocol
-    DB_URI = DB_URI.replace("postgres://", "postgresql://", 1)