https://www.onphpid.com/laravel-5-4-login-facebook-google-github-linkedin-bitbucket-bahasa-indonesia.html

user.php

<?php

namespace App;

use App\Models\SocialAccount;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password', 'avatar'
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    public function socialAccount()
    {
        return $this->hasMany(SocialAccount::class);
    }
}