authentication by login and email

hi,
how to activate login authentication in addition to email authentication ?

Object { id: 2, attributes: {…}, name: "xx", login: "", email: "xxx@xxxxx.net", phone: "000000000", readonly: false, administrator: false, map: "osm", latitude: 48.8567, … }

thanks

There is no login authentication. That login is there for linking to LDAP.