Laravel - Migrations - Updating Tables

The table method on the Schema facade may be used to update existing tables. Like the create method, the table method accepts two arguments: the name of the table and a closure that receives a Blueprint instance you may use to add columns or indexes to the table:

    use Illuminate\Database\Schema\Blueprint;
    use Illuminate\Support\Facades\Schema;
    Schema::table('users', function (Blueprint $table) {