Erro 400

Olá, estou fazendo o curso Springboot Seguranca, Cache e monitoramento, to tentando seguir as aulas de geração de token, estou tentando fazer autenticação em outro projeto, mas dá esse erro:

The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing).

Esse é o config:

package com.example.ornithology.config;

import com.example.ornithology.services.AuthenticationService;
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.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;

@EnableWebSecurity
@Configuration
public class SecurityConfigurations {

    @Autowired
    private AuthenticationService authenticationService;

    @Bean
    public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
        return authenticationConfiguration.getAuthenticationManager();
    }

    //Autorization
    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers(HttpMethod.GET, "/api/bird").permitAll()
                .antMatchers(HttpMethod.POST, "/auth").permitAll()
                .anyRequest().authenticated()
                .and().csrf().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        return http.build();
    }

    //Authentication
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(authenticationService).passwordEncoder(new BCryptPasswordEncoder());
    }

}

Esse é o Controller:

package com.example.ornithology.controllers;

import com.example.ornithology.config.TokenService;
import com.example.ornithology.controllers.form.LoginForm;
import com.example.ornithology.dto.TokenDto;
import org.springframework.beans.factory.annotation.Autowired;
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.*;

@RestController
@RequestMapping(value = "/auth")
public class AuthenticationController {

    @Autowired
    private AuthenticationManager authManager;

    @Autowired
    private TokenService tokenService;

    @PostMapping
    public ResponseEntity<TokenDto> authenticate(@RequestBody LoginForm form) {
        UsernamePasswordAuthenticationToken dataLogin = form.convert();

        try {
            Authentication authentication = authManager.authenticate(dataLogin);
            String token = tokenService.generateToken(authentication);
            System.out.println(token);
            return ResponseEntity.ok(new TokenDto(token, "Bearer"));
        } catch (AuthenticationException e) {
            return ResponseEntity.badRequest().build();
        }

    }

}