[xwiki-users] Import users from LDAP

Hi , Is there someone who success to import users from LDAP in xwiki 5.x ? I'm preparing a fresh install of xwiki 5.4 but have to give specific access to different spaces for +700 users. A bit difficult/boring to export/import users one by one from xwiki 2.8 to 5.4.( 2 different tomcat/oracle servers) Thanks for help Patrick