public String login() {
		session = (HttpSession)FacesContext.getCurrentInstance().getExternalContext().getSession(false);
		if (verificarUser(this.nome,this.senha)) {
			System.out.println("IF");
			if (session == null) {
				session = (HttpSession)FacesContext.getCurrentInstance().getExternalContext().getSession(true);
			}
			session.setAttribute("nome", nome);
			return "/index?faces-redirect=true";
		} else {
			if (session != null) {
				session.invalidate();
			}
		}
		return "/login";
	}