fkooman\OAuth\Client\AccessToken::getAccessToken PHP Method

    public function getAccessToken()
    {
        return $this->accessToken;
    }

 public function deleteAccessToken(AccessToken $accessToken)
 {
     $stmt = $this->db->prepare("DELETE FROM access_tokens WHERE client_config_id = :client_config_id AND user_id = :user_id AND access_token = :access_token");
     $stmt->bindValue(":client_config_id", $accessToken->getClientConfigId(), PDO::PARAM_STR);
     $stmt->bindValue(":user_id", $accessToken->getUserId(), PDO::PARAM_STR);
     $stmt->bindValue(":access_token", $accessToken->getAccessToken(), PDO::PARAM_STR);
     $stmt->execute();
     return 1 === $stmt->rowCount();
 }