405Method Not Allowed

Estou com este erro 405 na hora de postar "message": "Request method 'POST' not supported", "path": "/topicos/auth"

Já revi as aulas várias vezes e não sei onde estou errando:

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

import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.HttpMethod; import org.springframework.security.authentication.AuthenticationManager; 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.config.http.SessionCreationPolicy; import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@EnableWebSecurity @Configuration public class SecurityConfigurations extends WebSecurityConfigurerAdapter {

@Autowired
private AutenticacaoService autenticacaoService;

@Override
@Bean
protected AuthenticationManager authenticationManager() throws  Exception {
    return super.authenticationManager();
}

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

//configurações de autorização
@Override
protected void configure(HttpSecurity http) throws Exception {
    http.authorizeRequests()
            .antMatchers(HttpMethod.GET, "/topicos").permitAll()
            .antMatchers(HttpMethod.GET, "/topicos/*").permitAll()
            .antMatchers(HttpMethod.POST, "/topicos/auth").permitAll()
            .anyRequest().authenticated()
            .and().csrf().disable()
            .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);

}

//configuração de recursos estáticos (java script, css, imagens, etc.)
@Override
public void configure(WebSecurity web) throws Exception {
}

}