Scalr\Service\OpenStack\OpenStackConfig::setIdentityVersion PHP Method

    public function setIdentityVersion($version = null)
    {
        $this->identityVersion = $version ?: 2;
        switch ($this->identityVersion) {
            case 2:
                $this->authRequestBuilder = new RequestBuilderV2();
                break;
            case 3:
                $this->authRequestBuilder = new RequestBuilderV3();
                break;
            default:
                throw new NotSupportedException("Unsupported api version: {$this->identityVersion}");
        }
        return $this;
    }