docs: public String decodeSamlAuthnRequest(final String encodedRequestXmlString) {
          if (StringUtils.isEmpty(encodedRequestXmlString)) {
              return null;
          }
  
          val decodedBytes = EncodingUtils.decodeBase64(encodedRequestXmlString);
          if (decodedBytes == null) {
              return null;
          }
  
          return inflateAuthnRequest(decodedBytes);
      }