If we get some error on API (4xx or 5xx), we should be showing something on the screen

How to handle such errors and show message on the screen?

The code is:

import Route from '@ember/routing/route';
import ENV from 'website-my/config/environment';

const API_BASE_URL = ENV.BASE_API_URL;

export default class TasksRoute extends Route {
  model = async () => {
    const response = await fetch(`${API_BASE_URL}/tasks/self`, {
      credentials: 'include',
    });
    const allTasks = await response.json();

    return allTasks;
  };
}

I want to add error handling in this, How to do that?