public IActionResult Update(int id_empleado, int id_rol, int id_sucursal)
 {
     try
     {
         var c = new Empleado
         {
             id          = id_empleado,
             id_rol      = id_rol,
             id_sucursal = id_sucursal
         };
         em.Update(c);
         return(Ok());
     }
     catch (Exception ex)
     {
         return(StatusCode(500, ex));
     }
 }