Add support for an openid provider

app/Http/Controllers/Auth/SocialiteController.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Facades\Settings;
+use App\Http\Controllers\Controller;
+use App\Models\User;
+use Illuminate\Http\Request;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Str;
+use Laravel\Socialite\Facades\Socialite;
+
+class SocialiteController extends Controller
+{
+    public function redirect(Request $request, $driver)
+    {
+        return Socialite::driver($driver)->redirect();
+    }
+
+    public function callback(Request $request, $driver)
+    {
+        $socialiteUser = Socialite::driver($driver)->user();
+
+        /** @var User $user */
+        $user = User::firstOrNew([
+            'email' => $socialiteUser->getEmail(),
+        ], [
+            'name' => $socialiteUser->getName(),
+            'password' => bcrypt(Str::random()),
+        ]);
+
+        if (!$user->exists && Settings::get('disableRegistrationSso')) {
+            return response(401);
+        }
+
+        $user->last_seen_at = Carbon::now()->format('Y-m-d H:i:s');
+        $user->save();
+
+        Auth::guard()->login($user, true);
+
+        return redirect('/accounts?authenticated');
+    }
+}