Laravel 2 instances of BadMethodCallException: 'int does not exist' and 'method does not exist'

I am currently doing migrations in Laravel via the Terminal, and have these two errors when attempting to use php artisan migrate; I will print errors below:

 BadMethodCallException  : Method Illuminate\Database\Schema\Blueprint::int does not exist.

  at /Users/shaquilenoor/Desktop/chatapi/vendor/laravel/framework/src/Illuminate/Support/Traits/Macroable.php:100
     96|      */
     97|     public function __call($method, $parameters)
     98|     {
     99|         if (! static::hasMacro($method)) {
  > 100|             throw new BadMethodCallException(sprintf(
    101|                 'Method %s::%s does not exist.', static::class, $method
    102|             ));
    103|         }
    104| 

  Exception trace:

  1   Illuminate\Database\Schema\Blueprint::__call("int")
      /Users/shaquilenoor/Desktop/chatapi/database/migrations/2019_01_29_045824_create_contacts_table.php:15

  2   CreateContactsTable::{closure}(Object(Illuminate\Database\Schema\Blueprint))
      /Users/shaquilenoor/Desktop/chatapi/vendor/laravel/framework/src/Illuminate/Database/Schema/Builder.php:164

It seems both errors stem from my CreateContactsTable, so I will print the code from that file below:

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateContactsTable extends Migration
{
    public function up()
    {
        Schema::create('contacts', function (Blueprint $table) {
            $table->increments('id');
            $table->unsignedInteger('user1_id');
            $table->unsignedInteger('user2_id');
            $table->int('room_id')->unique();
            $table->timestamps();
            $table->foreign('room_id')->references('id')->on('rooms');
            $table->foreign('user1_id')->references('id')->on('users');
            $table->foreign('user2_id')->references('id')->on('users');
        });
    }

    public function down()
    {
        Schema::dropIfExists('contacts');
    }
}