code: public static byte[] decode(InputStream in) {
          try {
              return IOUtils.toByteArray(decodeToStream(in));
          } catch (IOException e) {
              e.printStackTrace();
              return null;
          }
      }
docs: Decode an input stream of b64-encoded data to an array of bytes.
  @param in
  @return the decoded bytes, or null if there was an error reading the bytes