I’m trying to retrieve the whole 1st row inside phpmyadmin: USERNAME; PASSWORD; EMAIL, and make it the value of three label.text in visual basic

Imports MySql.Data.MySqlClient
Module Module1
Public con As New MySqlConnection
Public cmd As New MySqlCommand

Sub openCon()
    con.ConnectionString = "server=localhost;username=root;password=;database=mydatabase"
    con.Open()


End Sub

End Module

---

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
If TextBox1.Text = “” Or TextBox2.Text = “” Or TextBox3.Text = “” Or TextBox4.Text = “” Or TextBox5.Text = “” Then
MsgBox(“Please fill up all the boxes”)
ElseIf TextBox2.Text <> TextBox3.Text Then

        MsgBox("Password doesn't match. Please check your input.")
    Else
        openCon()
        Try
            cmd.Connection = con
            cmd.CommandText = "INSERT INTO register (`USERNAME`,`PASSWORD`,`EMAIL`) VALUES('" & TextBox1.Text & "','" & TextBox2.Text & "','" & TextBox4.Text & "')"
            cmd.ExecuteNonQuery()
            MsgBox("Registered successfully!")
            TextBox1.Clear()
            TextBox2.Clear()
            TextBox3.Clear()
            TextBox4.Clear()
            TextBox5.Clear()


            Form3.Show()
            Me.Hide()

            con.Close()

        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
    End If
End Sub

All I know is to insert value to phpmyadmin but not retrieving it back to visual basic.