Mysql foreign key creation problem

Question

I am trying to implement a 1:1 relationship between the Employee table and the User table, in Mysql Workbench, but when generating the Diagram I see that the relationship always remains at 1:n, even with the strainCont UNIQUE in the foreign key.

CREATE TABLE `funcionario` (
  `id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
  `nome` varchar(50) NOT NULL,
  `cpf` varchar(50) NOT NULL UNIQUE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;


CREATE TABLE `usuario` (
  `id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
  `nome` varchar(50) NOT NULL UNIQUE,
  `senha` varchar(8) NOT NULL,
  `nivel` enum('1','2','3') NOT NULL,
  `datacadastro` DATE NOT NULL,
  `id_funcionario` int(11) NOT NULL UNIQUE,
  INDEX `fk_id_funcionario` (`id_funcionario` ASC)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

alter table `usuario`
add foreign key (`id_funcionario`) references `funcionario`(`id`);

How can I specify that for this case the relationship should be 1:1?