AuthenticationService.java line 43 - Double call to the database

[Deleted user]

You can retrieve the user details from the authentication object instead of making another call to the database:

Authentication authentication = authenticationManager.authenticate(
                new UsernamePasswordAuthenticationToken(
                        request.getUsernameOrEmail(),
                        request.getPassword()
                )
        );
var user = (User) authentication.getPrincipal();
var jwtToken = jwtService.generateJwt(user);

[Ryan]

Thank you! I also jsut discovered this.

[BOUALI Ali]

yes that's true.
As I mentioned, it is just a sample project to show how to implement JWT security with Spring boot