改进 创建用户迁移

database/migrations/2014_10_12_000000_create_users_table.php

@@ -17,6 +17,7 @@ public function up(): void
             $table->string('email')->unique();
             $table->timestamp('email_verified_at')->nullable();
             $table->string('password');
+            $table->boolean('is_admin')->default(false)->index();
             $table->rememberToken();
             $table->timestamps();
         });