Não consigo fazer o Login com SecurityConfigurations

Bom dia, seguindo a aula 03- Proteção com Spring Security ... não consigo permissão ao se logar : segue a codificação: SecurityConfigurations

package br.com.alura.forum.config.security;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@EnableWebSecurity
@Configuration
public class SecurityConfigurations extends WebSecurityConfigurerAdapter {

    @Autowired
    private AutenticacaoService autenticacaoService;

    //Configuração de autenticação (login, acesso)
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(autenticacaoService).passwordEncoder(new BCryptPasswordEncoder());
    }

    //configurações de autorização parte de url, perfil e o que acessar
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers(HttpMethod.GET, "/topicos").permitAll()
            .antMatchers(HttpMethod.GET, "/topicos/*").permitAll()
            .anyRequest().authenticated()
            .and().formLogin();
    }

    //configurações de recursos estaticos, requisiçãoes de arquivos ( js, css, imagens, etc.)
    @Override
    public void configure(WebSecurity web) throws Exception {

    }

//    public static void main(String[] args) {
//        System.out.println(new BCryptPasswordEncoder().encode("123456"));
//    }
}

AutenticacaoService:

package br.com.alura.forum.config.security;

import java.util.Optional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import br.com.alura.forum.modelo.Usuario;
import br.com.alura.forum.repository.UsuarioRepository;

@Service
public class AutenticacaoService implements UserDetailsService{

    @Autowired
    private UsuarioRepository repository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Optional<Usuario> usuario = repository.findByEmail(username);
        if(usuario.isPresent()) {
            return usuario.get();
        }

        throw new UsernameNotFoundException("Dados inválidos");
    }

}

UsuarioRepository:

package br.com.alura.forum.repository;

import java.util.Optional;

import org.springframework.data.jpa.repository.JpaRepository;

import br.com.alura.forum.modelo.Usuario;

public interface UsuarioRepository extends JpaRepository<Usuario, Long>{

        Optional<Usuario> findByEmail(String email);
}