src/ShopifyApp/resources/database/migrations/2018_08_30_114021_add_namespace_to_shops_table.php
public function up()
    {
        Schema::table('shops', function (Blueprint $table) {
            $table->string('namespace')->nullable(true)->default(null);
        });
    }
public function up()
    {
        Schema::table('shops', function (Blueprint $table) {
            $table->string('namespace')->nullable(true)->default(null);
        });
    }
Run the migrations.

@return void