User.php

<?php
namespace App;
use Illuminate\Auth\Authenticatable;
use Laravel\Lumen\Auth\Authorizable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\Access\Authorizable as AuthorizableContract;
class User extends Model implements AuthenticatableContract, AuthorizableContract
{
    use Authenticatable, Authorizable;
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'password'
    ];
    /**
     * Append links attribute.
     *
     * @var array
     */
    protected $appends = ['_links'];
    /**
     * Set attributes links
     *
     * @return array
     */
    public function getLinksAttribute()
    {
        return [
            'self' => app()->make('url')->to("/users/{$this->attributes['id']}")
        ];
    }
    /**
     * The attributes excluded from the model's JSON form.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'created_at', 'updated_at'
    ];
}