first bits, try to register a user backend

Author: ylebre

solid/appinfo/info.xml

@@ -16,6 +16,9 @@ When you do this, the Solid App can store data in your Nextcloud account through
     <author mail="auke@muze.nl" >Auke van Slooten</author>
     <namespace>Solid</namespace>
     <category>integration</category>
+    <types>
+        <authentication/>
+    </types>
     <bugs>https://github.com/pdsinterop/solid-nextcloud/issues</bugs>
     <dependencies>
         <nextcloud min-version="28" max-version="30"/>

solid/lib/AppInfo/Application.php

@@ -10,6 +10,7 @@
 use OCA\Solid\Service\SolidWebhookService;
 use OCA\Solid\Db\SolidWebhookMapper;
 use OCA\Solid\Middleware\SolidCorsMiddleware;
+use OCA\Solid\ClientAuth;
 
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
@@ -67,6 +68,7 @@ public function register(IRegistrationContext $context): void {
     }
 
     public function boot(IBootContext $context): void {
+        \OC::$server->getUserManager()->registerBackend(new \OCA\Solid\ClientAuth());
         self::$userSubDomainsEnabled = OC::$server->get(AppConfig::class)->getValueBool(self::APP_ID, 'userSubDomainsEnabled');
         require_once(__DIR__.'/../../vendor/autoload.php');
     }

solid/lib/ClientAuth.php

@@ -0,0 +1,20 @@
+<?php
+	namespace OCA\Solid;
+
+	use OCP\User\Backend\ABackend;
+	use OCP\User\Backend\ICheckPasswordBackend;
+	
+	/**
+	 * @package OCA\Solid
+	 */
+	class ClientAuth extends ABackend implements ICheckPasswordBackend {
+	        private $config;
+
+		public function __construct(IConfig $config) {
+		    $this->config = $config;
+		}
+
+                public function checkPassword(string $username, string $password) {
+                    return true;
+                }
+	}