Calling Handler From Unity's Main Thread

The previous error handler received responses from external threads to handle error checks. However, from the 5.12.0 version, there is no longer a need to declare Poll, as the server request operates in the main thread.

Example

public class BackendErrorManager : MonoBehaviour {

    void Start() {

        if(Backend.IsInitialized) {
            Backend.ErrorHandler.OnMaintenanceError = () => {
                Debug.Log("Maintenance error occurred!!!");
                gameObject.GetComponentInChildren<Text>().text = "Under maintenance.";
            };
            Backend.ErrorHandler.OnTooManyRequestError = () => {
                Debug.Log("403 error occurred!!!");
                gameObject.GetComponentInChildren<Text>().text = "Excessive requests detected.";
            };
            Backend.ErrorHandler.OnTooManyRequestByLocalError = () => {
                Debug.Log("403 local error occurred!!!");
                gameObject.GetComponentInChildren<Text>().text = "Excessive requests.";
            };
            Backend.ErrorHandler.OnOtherDeviceLoginDetectedError = () => {
                Debug.Log("Cannot refresh!!!");
                gameObject.GetComponentInChildren<Text>().text = "Login detected from another device.";
            };
        }
    }
}