async delete(req, res) {
        if(!req.params.id) {
            res.status(400);
            res.json({ 
                success: false, 
                message: 'Bad request'
            });
        }
        const id = req.params.id;
        const deletedEmployee = await Employee.findByIdAndDelete(id);
        res.status(200);
        res.json({
            success: true,
            data: deletedEmployee,
            message: 'Ok'
        });
    },