checkUserName method
Implementation
Future checkUserName({
required String userName
}) async {
var url = '/check-username';
var params = {
'userName': userName,
};
var resp = await _invoke(url, params);
if (resp['result'] == 'OK') {
return true;
}
else if (resp['result'] == 'NOT_ALLOWED') {
return false;
}
else {
throw resp['result'];
}
}