MysqlUser.php

<?php

use Illuminate\Support\Facades\Schema;
use Jenssegers\Mongodb\Eloquent\HybridRelations;

class MysqlUser extends Eloquent
{
    use HybridRelations;

    protected $connection = 'mysql';
    protected $table = 'users';
    protected static $unguarded = true;

    public function books()
    {
        return $this->hasMany('Book', 'author_id');
    }

    public function role()
    {
        return $this->hasOne('Role');
    }

    public function mysqlBooks()
    {
        return $this->hasMany(MysqlBook::class);
    }

    /**
     * Check if we need to run the schema.
     */
    public static function executeSchema()
    {
        $schema = Schema::connection('mysql');

        if (!$schema->hasTable('users')) {
            Schema::connection('mysql')->create('users', function ($table) {
                $table->increments('id');
                $table->string('name');
                $table->timestamps();
            });
        }
    }
}