MySQL Cluster Manager 1.3 Release Notes
Before you can start using MySQL Cluster Manager to create and manage a MySQL Cluster, the MySQL Cluster Manager agent must be started on each computer that is intended to host one or more nodes in the MySQL Cluster to be managed.
The MySQL Cluster Manager agent employs a MySQL user account for administrative access to mysqld processes. It is possible, but not a requirement, to change the default user name, the default password used for this account, or both. For more information, see Section 2.3.3, “Setting the MySQL Cluster Manager Agent User Name and Password”.