docs: public ApnsServiceBuilder withCert(String fileName, String password)
      throws RuntimeIOException, InvalidSSLConfig {
          FileInputStream stream = null;
          try {
              stream = new FileInputStream(fileName);
              return withCert(stream, password);
          } catch (FileNotFoundException e) {
              throw new RuntimeIOException(e);
          } finally {
              Utilities.close(stream);
          }
      }