* @param roles role names. Valid roles are listed in Role.cs
* @throws AerospikeException if command fails
*/
public void GrantRoles(AdminPolicy policy, String user, List<String> roles) throws AerospikeException {
AdminCommand command = new AdminCommand();
command.grantRoles(cluster, policy, user, roles);
}
/**
* Remove roles from user's list of roles.
*