public function validateTenantName()
{
$path = '/' . $this->tenantName . '/.well-known/openid-configuration';
$request = $this->getClient()->prepareRequest($path, 'GET', self::AUTH_API_VERSION, self::URL_LOGIN_WINDOWS);
$response = $this->getClient()->call($request);
if (200 == $response->getResponseCode()) {
$this->tenantIsValid = true;
} else {
$this->tenantIsValid = false;
}
return $this->tenantIsValid;
}