public function roles()
{
    return $this
    ->belongsToMany('AppRole')
    ->withTimestamps();
}

public function users(){
return $this
    ->belongsToMany('AppUser')
    ->withTimestamps();
}

public function up()
{
Schema::create('role_user', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('role_id')->unsigned();
    $table->integer('user_id')->unsigned();
    $table->timestamps();
});
}

{{ Auth::user()->nombre }}

{{ Auth::user()->roles()->nombre }}