How to return a MAP using nativeQuery from JPA?

I need to consult a bank that is already created, populated, and maintained by another application. So I do not have the entities in my project and I did not even want to create them.

I'm using Spring Boot with JPA. Here is an example code:

@PersistenceContext
protected EntityManager manager;

public Map<String, Object> getUsuario(String email, String senha) {
    Map<String, Object> parameters = new HashMap<>();
    parameters.put("email", email);
    parameters.put("senha", senha);

    Query query = manager.createNativeQuery(
            "SELECT * FROM usuarios WHERE email = :email AND senha = :senha");
    preencherParametros(parameters, query);

    List<Map<String, Object>> resultList = query.getResultList();

    return resultList.get(0);
}

I wanted the result of this query to return me a Map with the name of the column and its value. How to do this?