NginX LDAP

I need to configure nginx to sign in by two kinds dn : cn=appname,ou=Applications,o=example.com uid=username,ou=People,o=example.com Here is piece of code for ldap server: ldap_server ldapserver { url ldaps://ldap.example.com/o=example.com?uid,cn?sub?(..filter for search...) } However, only username can be signed in, appname can't. But if I switch the position of uid and cn for that url, like url ldaps://ldap.example.com/o=example.com?cn,uid?sub?(..filter for search...)