SocialiteProviders\Manager\OAuth1\AbstractProvider::user PHP Method

    public function user()
    {
        if (!$this->hasNecessaryVerifier()) {
            throw new \InvalidArgumentException('Invalid request. Missing OAuth verifier.');
        }
        $token = $this->getToken();
        $tokenCredentials = $token['tokenCredentials'];
        $user = $this->mapUserToObject((array) $this->server->getUserDetails($tokenCredentials));
        $user->setToken($tokenCredentials->getIdentifier(), $tokenCredentials->getSecret());
        if ($user instanceof User) {
            parse_str($token['credentialsResponseBody'], $credentialsResponseBody);
            if (!$credentialsResponseBody || !is_array($credentialsResponseBody)) {
                throw new CredentialsException('Unable to parse token credentials response.');
            }
            $user->setAccessTokenResponseBody($credentialsResponseBody);
        }
        return $user;
    }