getProxy method
Implementation
Future<String> getProxy(Function(String)? callback) async {
final prefs = await SharedPreferences.getInstance();
_proxyUrl = prefs.getString(_proxyUrlKey) ?? '';
_isEnabled = prefs.getBool(_proxyEnabledKey) ?? false;
if (_isEnabled) {
callback?.call(_proxyUrl);
return _proxyUrl;
} else {
callback?.call("");
return '';
}
}