GOOGLE_ADS_NOT_CONNECTED or GOOGLE_ADS_CREDENTIALS_ERROR.

GOOGLE_ADS_RECONNECT_REQUIRED — the stored OAuth grant is dead and the user must reconnect. (Also returned for an invalid Analify token.)

Valid token, but it belongs to a different organization, the plan lacks api_access, or a mutation was attempted with a read-only token.

GOOGLE_ADS_API_ERROR — carries Google's own message.