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

<?php
namespace AdamWathan\EloquentOAuth;

use App\Models\User;
use Illuminate\Database\Eloquent\Model;
use SocialNorm\ProviderUser;

class EloquentIdentityStore implements IdentityStore
{
    public function getByProvider(string $provider, ProviderUser $providerUser)
    {
        return OAuthIdentity::where('provider', $provider)
            ->where('provider_user_id', $providerUser->id)
            ->first();
    }

	/**
	 * Try to retrieve user by their e-mail
	 * (!!! this is coupled to the application code !!!)
	 *
	 * @param ProviderUser $providerUser
	 * @return User|Model|null|object
	 */
	public function getByEmail(ProviderUser $providerUser)
	{
		$first = User::where('email', $providerUser->email)->first();

		if($first->email) return $first;
		return null;
	}

    public function flush(Model $user, string $provider)
    {
        OAuthIdentity::where('user_id', $user->getKey())
            ->where('provider', $provider)
            ->delete();
    }

    public function store(OAuthIdentity $identity)
    {
        $identity->save();
    }

    public function userExists(string $provider, ProviderUser $providerUser, bool $allowByEmail)
    {
        $byProvider = (bool) $this->getByProvider($provider, $providerUser);
        if ($byProvider) return true;

        if (!$allowByEmail) return false;

        if ($providerUser->email) {
	        $byEmail = $this->getByEmail($providerUser);
	        if ($byEmail) return true;
        }

        return false;
    }
}