Get a return of a method in another Java class

Question

I have a method in my Spring boot API that receives the data from the user who is logging in, checks if it exists and if the password checks. Once this is done, return returns a JWT token. I need to catch this return of the token in another Java class. I am unable to do.

My method that receives the user and generates the token.

@RequestMapping(value = "/autenticar", consumes = MediaType.APPLICATION_JSON_UTF8_VALUE, method = RequestMethod.POST)
public LoginResponse autenticar(@RequestBody Usuarios usuarios)
        throws ServletException {

    // verifica se foram digitados o login e senha no front end
    if (usuarios.getLogin() == null
            || usuarios.getSenha() == null) {
        throw new  ServletException("Nome ou senha obrigatório");

    }

    // busca no banco de dados
    Usuarios usuariosAutenticado = uService.buscarPorLogin(usuarios.getLogin());

    if (usuariosAutenticado == null) {
        return new LoginResponse("naoEncontrado");
    }       

    // compara a senha vinda do banco de dados com a senha vinda da tela
    if (!usuariosAutenticado.getSenha()
            .equals(usuarios.getSenha())) {
        return new LoginResponse("senhaInvalida");
    }

    String token = Jwts.builder().setSubject(usuariosAutenticado.getLogin())
            .signWith(SignatureAlgorithm.HS512, "xxx")
            .setExpiration(new Date(System.currentTimeMillis() + 60 * 60 * 1000)).compact();            

    return new LoginResponse(token);
}

i need to receive the token Return within that method

public void newRevision(Object revisionEntity) {
    AuditEntity revEntity = (AuditEntity) revisionEntity;

    //aqui e preciso do token
}

There’s a way I can do that ???