code: public function getProjectBalance($serviceName){
          if (!$serviceName)
              throw new BadMethodCallException('Missing parameter $serviceName (OVH Cloud Project).');
          try {
              $r = $this->get('cloud/project/'.$serviceName.'/balance')->send();
          }
          catch (\Exception $e) {
              throw new CloudException($e->getMessage(), $e->getCode(), $e);
          }
          return $r->getBody(true);
      }
docs: Get Project Balance
  GET /cloud/project/{serviceName}/balance
  
  @return
  @throws \Ovh\Cloud\Exception\CloudException
  @throws \Ovh\Common\Exception\BadMethodCallException