code: public void setMemberServicesUrl(String url, String pem) throws CertificateException {
          this.setMemberServices(new MemberServicesImpl(url,pem));
      }
docs: Set the member services URL
  @param url Member services URL of the form: "grpc://host:port" or "grpcs://host:port"
  @param pem permission
  @throws CertificateException exception