private static String parseRequestVerificationToken(final String page) {
        return TextUtils.getMatch(page, GCConstants.PATTERN_REQUESTVERIFICATIONTOKEN, "");
    }
Adds the cache to the favorites of the user.
<br>
This must not be called from the UI thread.

@param cache the cache to add
@return {@code false} if an error occurred, {@code true} otherwise
main/src/main/java/cgeo/geocaching/connector/gc/GCParser.java