If the manager has been created with Manager.for_service_type
, this signal will be emitted when an account (identified by account_id) has been modified in such a way that the
application might be interested to start or stop using it: the "enabled" flag on the account or in some service supported by the account
and matching the service_type have changed.
In practice, this signal might be emitted more often than when strictly needed; applications must call list_enabled_services or list_enabled to get the current state.
| account_id |
the AccountId of the account that has been enabled. |