Build a JWT endpoint to work with the Support SDK for mobile applications to authenticate users in Zendesk Support (PHP/Symfony) Implentation

UtilityController.php

<?php
/**
 * Created by PhpStorm.
 * User: bhaktaraz
 * Date: 11/26/19
 * Time: 2:10 PM
 */

namespace App\Controller\API\V1;

use App\Entity\User;
use Firebase\JWT\JWT;
use Swagger\Annotations as SWG;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;
use FOS\RestBundle\Controller\AbstractFOSRestController;

class UtilityController extends AbstractFOSRestController
{
    /**
     * Zendesk Support service POST request JWT endpoint
     *
     * @Route("/api/jwt-zendesk", methods={"POST"})
     * @SWG\Response(
     *     response=200,
     *     description="Returns a jwt token response",
     * )
     *
     * @SWG\Parameter(
     *     name="user_token",
     *     in="query",
     *     type="string",
     *     description="User identifier provided by the app (User Id)"
     * )
     *
     * @SWG\Tag(name="Utility")
     * @param Request $request
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function jwt(Request $request)
    {
        $token = $request->get('user_token');

        if(empty($token)){
            $view = $this->view(null, 401);
            return $this->handleView($view);
        }


        $em = $this->getDoctrine()->getManager();
        /** @var User $user */
        $user = $em->getRepository(User::class)->find($token);

        if(!$user instanceof User){
            $view = $this->view(null, 401);
            return $this->handleView($view);
        }

        $secret = $this->getParameter('zendesk_secret_key');

        $payload = [
            'name' => $user->getName(),
            'email' => $user->getEmail(),
            'phone' => $user->getPhone(),
            'jti' => $token, "iat" => time()
        ];

        $jwt = JWT::encode($payload, $secret,'HS256');

        $response["jwt"] = $jwt;

        $view = $this->view($response, 200);
        return $this->handleView($view);
    }
}