laravel migration add column to existing table
php artisan make:migration add_paid_to_users_table --table=users
  
public function up()
{
    Schema::table('users', function($table) {
        $table->integer('paid');
    });
}
public function down()
{
    Schema::table('users', function($table) {
        $table->dropColumn('paid');
    });
}
php artisan migrate
