docs: public ApnsServiceBuilder withCert(InputStream stream, String password)
      throws InvalidSSLConfig {
          assertPasswordNotEmpty(password);
          return withSSLContext(new SSLContextBuilder()
                  .withAlgorithm(KEY_ALGORITHM)
                  .withCertificateKeyStore(stream, password, KEYSTORE_TYPE)
                  .withDefaultTrustKeyStore()
                  .build());
      }