Add namespace for seeders

database/seeders/DatabaseSeeder.php

@@ -1,5 +1,7 @@
 <?php
 
+namespace Database\Seeders;
+
 use Illuminate\Database\Seeder;
 
 class DatabaseSeeder extends Seeder

database/seeders/UserSeeder.php

@@ -1,7 +1,10 @@
 <?php
 
+namespace Database\Seeders;
+
 use App\User;
 use Illuminate\Database\Seeder;
+use Illuminate\Support\Facades\Hash;
 
 class UserSeeder extends Seeder
 {