datatable.directory/sideload/adamwathan/eloquent-oauth/src/UserStore.php

<?php namespace AdamWathan\EloquentOAuth;

use Illuminate\Database\Eloquent\Model;

class UserStore
{
    /** @var string */
    protected $modelClass;

    public function __construct(string $modelClass)
    {
        $this->modelClass = $modelClass;
    }

    public function create()
    {
        $user = new $this->modelClass;
        return $user;
    }

    public function store(Model $user)
    {
        return $user->save();
    }

    public function findByIdentity(OAuthIdentity $identity)
    {
        return $identity->belongsTo($this->modelClass, 'user_id')->firstOrFail();
    }

    public function findByEmail(string $email)
    {
        return $this->modelClass::where('email', $email)->firstOrFail();
    }
}