relation between DB in Eloquent ORM whit name Attribute

hi i have 2 Database User And Massage .

every massage has tow user , one sender and one receiver.

and i want to Store sender and receiver user by its names.

i write this code and it have Error , what do you suggest?

code in message tabale :

public function up()
{
    Schema::create('massage', function(Blueprint $table)
    {
        $table->increments('id');
        $table->string('sender_user_name');
        $table->string('receiver_user_name');
        $table->string('tittle');
        $table->text('body');
        $table->timestamps();
        $table->timestamp('published_at');

        $table->foreign('sender_user_name')
            ->references('name')
            ->on('users')
            ->onDelete('cascade');

        $table->foreign('receiver_user_name')
            ->references('name')
            ->on('users');
    });
}

User tabel :

public function up()
{
    Schema::create('users', function(Blueprint $table)
    {
        $table->increments('id');
        $table->string('name');
        $table->string('email')->unique();
        $table->string('password', 60);
        $table->rememberToken();
        $table->timestamps();
    });
}

Code for saving message ( Tittle , body , and Times insert in form ):

    $input = $request->all();
    $input['sender_user_name'] =  Auth::user()->name;
    Massage::create($input);

and this is My error :

ndefined property: Illuminate\Database\Eloquent\Relations\BelongsTo::$name (View: C:\xampp\htdocs\massage\resources\views\articles\index.blade.php)

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