1 - How can I get the Exception message from my server? in my server(spring boot restController) I return one message when Exception with this code:

@ResponseStatus(HttpStatus.NOT_FOUND)
public class UsuarioNotFoundException extends  RuntimeException{
    public UsuarioNotFoundException(String email) {
        super("Usuário não encontrado: " + email + ", Favor verificar o email ou a senha informados");
    }
}

So how can I get this custom error message with RestEasy client?