fix: auth strategy dependent username label

server/modules/authentication/ldap/definition.yml

@@ -7,6 +7,7 @@ color: blue darken-3
 website: https://www.microsoft.com/windowsserver
 isAvailable: true
 useForm: true
+usernameLabel: 'auth:fields.username'
 props:
   url:
     title: LDAP URL