// TODO check token is valid or refresh token from server?
public void checkOrUpdateToken() {
            // TODO check token is valid or refresh token from server?
        }
public void checkOrUpdateToken() {
// TODO check token is valid or refresh token from server?
}
public void checkOrUpdateToken() {
// TODO check token is valid or refresh token from server?
}
public void checkOrUpdateToken() {
// TODO check token is valid or refresh token from server?
}