code: public synchronized @CheckForNull HashedToken revokeToken(@Nonnull String tokenUuid) {
          for (Iterator<HashedToken> iterator = tokenList.iterator(); iterator.hasNext(); ) {
              HashedToken token = iterator.next();
              if (token.uuid.equals(tokenUuid)) {
                  iterator.remove();
                  
                  return token;
              }
          }
          
          return null;
      }
docs: Remove a token given its identifier. Effectively make it unusable for future connection.
  
  @param tokenUuid The identifier of the token, could be retrieved directly from the {@link HashedToken#getUuid()}
  @return the revoked token corresponding to the given {@code tokenUuid} if one was found, otherwise {@code null}