Evernote\Client::getBusinessAuth PHP Method

    protected function getBusinessAuth()
    {
        if (null === $this->businessAuth) {
            try {
                $this->businessAuth = $this->getAdvancedClient()->getUserStore()->authenticateToBusiness($this->token);
            } catch (\Exception $e) {
                throw ExceptionFactory::create($e);
            }
        }
        return $this->businessAuth;
    }