Informaçao nao disponivel no arquivo do modulo

Oi, Artur. Tudo bem?

Peço desculpas pela demora na resposta e por você não ter encontrado o arquivo na plataforma, estou enviando ele aqui e disponibilizando no capitulo da aula.

package br.com.alura.forum.controller;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Profile;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import br.com.alura.forum.config.security.TokenService;
import br.com.alura.forum.controller.dto.TokenDto;
import br.com.alura.forum.controller.form.LoginForm;
import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.MeterRegistry;

@RestController
@RequestMapping("/auth")
@Profile(value = {"prod", "test"})
public class AutenticacaoController {

    Counter authUserSuccess;
    Counter authUserErrors;

    public AutenticacaoController(MeterRegistry registry) {
        authUserSuccess = Counter.builder("auth_user_success")
            .description("usuarios autenticados")
            .register(registry);

        authUserErrors = Counter.builder("auth_user_error")
                .description("erros de login")
                .register(registry);
    }

    @Autowired
    private AuthenticationManager authManager;

    @Autowired
    private TokenService tokenService;

    @PostMapping
    public ResponseEntity<TokenDto> autenticar(@RequestBody @Valid LoginForm form) {
        UsernamePasswordAuthenticationToken dadosLogin = form.converter();

        try {
            Authentication authentication = authManager.authenticate(dadosLogin);
            String token = tokenService.gerarToken(authentication);
            authUserSuccess.increment();
            return ResponseEntity.ok(new TokenDto(token, "Bearer"));

        } catch (AuthenticationException e) {
            authUserErrors.increment();
            return ResponseEntity.badRequest().build();
        }
    }
}

Obrigado por informar a ausência do conteúdo no capítulo da aula.

Abraços e bons estudos!