tethys.backend/app/Middleware/SilentAuth.ts

import type { HttpContextContract } from '@ioc:Adonis/Core/HttpContext';

/**
 * Silent auth middleware can be used as a global middleware to silent check
 * if the user is logged-in or not.
 *
 * The request continues as usual, even when the user is not logged-in.
 */
export default class SilentAuthMiddleware {
    /**
     * Handle request
     */
    public async handle({ auth }: HttpContextContract, next: () => Promise<void>) {
        /**
         * Check if user is logged-in or not. If yes, then `ctx.auth.user` will be
         * set to the instance of the currently logged in user.
         */
        await auth.check();
        await next();
    }
}