code: public function up()
      {
          Schema::create('ltm_user_locales', function (Blueprint $table) {
              $table->increments('id');
              $table->integer('user_id', false, true);
              $table->text('locales')->nullable();
              $table->index(['user_id'], 'ix_ltm_user_locales_user_id');
              $table->timestamps();
          });
      }
docs: Run the migrations.
  
  @return void