Enable login by any attribute - defaults to uid.

Implements #253

app/helpers.php

@@ -0,0 +1,13 @@
+<?php
+
+use Illuminate\Support\Arr;
+
+function login_attr_description(): string
+{
+	return Arr::get(config('ldap.login.attr'),login_attr_name());
+}
+
+function login_attr_name(): string
+{
+	return key(config('ldap.login.attr'));
+}