@Override
    public Credentials getCredentials() {
        return Settings.getCredentials(R.string.pref_username, R.string.pref_password);
    }
Remove a cache from the favorites list.
<br>
This must not be called from the UI thread.

@param cache the cache to add
@return {@code true} if the cache was successfully added, {@code false} otherwise
main/src/main/java/cgeo/geocaching/connector/gc/GCConnector.java