docs: public String authenticateBASIC(final HttpServletRequest request) {
          LOG.debug("authenticateBASIC");
          boolean valid = false;
          String userID = null;
          String password = null;
          try {
              final String authHeader = request.getHeader("Authorization");
              if (authHeader != null) {
                  final StringTokenizer st = new StringTokenizer(authHeader);
                  if (st.hasMoreTokens()) {
                      final String basic = st.nextToken();
                      if (basic.equalsIgnoreCase("Basic")) {
                          final String credentials = st.nextToken();
                          final String userPass = new String(Base64.decodeBase64(credentials.getBytes()));
                          final int p = userPass.indexOf(":");
                          if (p != -1) {
                              userID = userPass.substring(0, p);
                              password = userPass.substring(p + 1);
  
                              // Validate the User.
                              valid = validateUser(userID, password);
                          }
                      }
                  }
              }
          } catch (final Exception e) {
              LOG.debug("An error occured while processing Basic authentication", e);
          }
          if (valid) {
              // For now assume userID as userName
              return userID;
          }
          return null;
      }