Values:
ERROR_CODE_UNSPECIFIED (0):
Not specified. ERROR_CODE_DEFAULT is assumed.
ERROR_CODE_DEFAULT (0):
All other error types.
ERROR_CODE_OVER_QUOTA (1):
Application has exceeded a resource quota.
ERROR_CODE_DOS_API_DENIAL (2):
Client blocked by the application's Denial of
Service protection configuration.
ERROR_CODE_TIMEOUT (3):
Deadline reached before the application
responds.