Não consigo acessar após o login

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.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@EnableWebSecurity
@Configuration
public class SecurityConfigurations extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService autenticacaoService;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {

        auth.userDetailsService(autenticacaoService).passwordEncoder(new BCryptPasswordEncoder());

    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests().antMatchers(HttpMethod.GET, "/topicos").permitAll()
                .antMatchers(HttpMethod.GET, "/topicos/*")
                .permitAll().anyRequest().authenticated().and().formLogin();

    }

}

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

import java.util.Optional;

import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

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

public class AutenticacaoService implements UserDetailsService{

    private UsuarioRepository usuarioRepository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        Optional<Usuario> usuario = usuarioRepository.findByEmail(username);
        if(usuario.isPresent()) {
            return usuario.get();
        } 

        throw new UsernameNotFoundException("Dados inválidos!"); 
    }

}

insira seu código aqui

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 mail);

}

O que eu achei estranho, é a mudança de hash sempre que eu mando calcular. Como eu resolvo esse problema? Pelo q eu vi está identico a aula. Posso ter deixado passar algo, mas não consigo ver.