How to create JWT token in Symfony5? - symfony

Question

I'm trying to create REST API with JWT authentification in Symfony5. At first I've tried to do as written here https://h-benkachoud.medium.com/symfony-rest-api-without-fosrestbundle-using-jwt-authentication-part-2-be394d0924dd . Difficulties appeared when I've tried to make method getTokenUser:
/**
* #param JWTTokenManagerInterface $JWTManager
* #return JsonResponse
* #Route("/api/login_check", name="api_login_check", methods={"POST"})
*/
public function getTokenUser(UserInterface $user,JWTTokenManagerInterface $JWTManager)
{
return new JsonResponse(['token' => $JWTManager->create($user)]);
}
Symfony says that UserInterface is not service so it can't Autowire it.
Ok, then I've tried to find another articles about this problem. But surprisingly they just doesn't say how to write this method. For example, here https://digitalfortress.tech/php/jwt-authentication-with-symfony/ appears like route /api/login_check must work authomatically if it configured in security.yaml and in routes.yaml. But no, it doesn't work.
So how must I write controller?
My security.yaml is:
security:
encoders:
App\Entity\User:
algorithm: bcrypt
# https://symfony.com/doc/current/security.html#where-do-users-come-from-user-providers
providers:
app_user_provider:
entity:
class: App\Entity\User
property: email
firewalls:
login:
pattern: ^/api/login
stateless: true
anonymous: true
json_login:
check_path: /api/login_check
success_handler: lexik_jwt_authentication.handler.authentication_success
failure_handler: lexik_jwt_authentication.handler.authentication_failure
api:
pattern: ^/api
stateless: true
provider: app_user_provider
guard:
authenticators:
- lexik_jwt_authentication.jwt_token_authenticator
dev:
pattern: ^/(_(profiler|wdt)|css|images|js)/
security: false
main:
anonymous: true
# activate different ways to authenticate
# https://symfony.com/doc/current/security.html#firewalls-authentication
# https://symfony.com/doc/current/security/impersonating_user.html
# switch_user: true
# Easy way to control access for large sections of your site
# Note: Only the *first* access control that matches will be used
access_control:
- { path: ^/register, roles: IS_AUTHENTICATED_ANONYMOUSLY }
- { path: ^/api/login, roles: IS_AUTHENTICATED_ANONYMOUSLY }
- { path: ^/api, roles: IS_AUTHENTICATED_FULLY }

Answer 1

it's true you do not need this method. You should refer to the documentation of the bundle you are using:
https://github.com/lexik/LexikJWTAuthenticationBundle/blob/2.x/Resources/doc/index.rst
In fact the login URL is handled by the security component of Symfony and rely on the configuration you set under json_login key :) .
Once again, it's detailed in the documentation (section "Usage").