public IActionResult GeneracionToken([FromBody] Json value, string key)
 {
     if (ModelState.IsValid && key.Length >= 16 && key != null)
     {
         var token = JWT.CrearToken(value.Nombre, value.Edad, key);
         return(StatusCode(202, token));
     }
     else
     {
         return(StatusCode(406));
     }
 }