'clear_on_error' => [ '_password', '_password2' ],
'process_m2m' => { 'link_table' => 'access_usergroup',
'target_table' => 'access_group',
'clear_on_error' => [ '_password', '_password2' ],
'process_m2m' => { 'link_table' => 'access_usergroup',
'target_table' => 'access_group',