vito/app/Support/SocialiteProviders/DropboxProvider.php

<?php

namespace App\Support\SocialiteProviders;

use GuzzleHttp\Exception\GuzzleException;
use Illuminate\Support\Arr;
use Laravel\Socialite\Two\AbstractProvider;
use Laravel\Socialite\Two\ProviderInterface;
use Laravel\Socialite\Two\User;

class DropboxProvider extends AbstractProvider implements ProviderInterface
{
    /**
     * Unique Provider Identifier.
     */
    public const IDENTIFIER = 'DROPBOX';

    /**
     * {@inheritdoc}
     */
    protected $scopeSeparator = ' ';

    /**
     * {@inheritdoc}
     */
    protected function getAuthUrl($state): string
    {
        return $this->buildAuthUrlFromBase('https://www.dropbox.com/oauth2/authorize', $state);
    }

    /**
     * {@inheritdoc}
     */
    protected function getTokenUrl(): string
    {
        return 'https://api.dropboxapi.com/oauth2/token';
    }

    /**
     * {@inheritdoc}
     */
    protected function getTokenFields($code): array
    {
        return array_merge(parent::getTokenFields($code), [
            'grant_type' => 'authorization_code',
        ]);
    }

    /**
     * {@inheritdoc}
     *
     * @throws GuzzleException
     */
    protected function getUserByToken($token)
    {
        $response = $this->getHttpClient()->post('https://api.dropboxapi.com/2/users/get_current_account', [
            'headers' => [
                'Authorization' => 'Bearer '.$token,
            ],
        ]);

        return json_decode($response->getBody(), true);
    }

    /**
     * {@inheritdoc}
     */
    protected function mapUserToObject(array $user): User
    {
        return (new User)->setRaw($user)->map([
            'id' => $user['account_id'],
            'nickname' => null,
            'name' => $user['name']['display_name'],
            'email' => $user['email'],
            'avatar' => Arr::get($user, 'profile_photo_url'),
        ]);
    }
}