private void LoginEmpbtn_Click(object sender, EventArgs e)
        {
            #region Condition
            if (string.IsNullOrWhiteSpace(UsernameTbox.Text) &&
                string.IsNullOrWhiteSpace(PasswordTbox.Text))
            {
                MessageBox.Show("Please Fill All The Fields");
                return;
            }

            #endregion

            FirebaseResponse res     = client.Get("employee/" + UsernameTbox.Text);
            AdminModel       ResUser = res.ResultAs <AdminModel>(); // DB Result


            AdminModel CurUser = new AdminModel() // user given info
            {
                Username = UsernameTbox.Text,
                Password = PasswordTbox.Text,
            };

            if (AdminModel.IsEqual(ResUser, CurUser))
            {
                Dashboard ds = new Dashboard(ResUser.Username);
                ds.Show();
                this.Hide();
            }

            else
            {
                AdminModel.ShowError();
            }
        }