Please Help! error: Cannot create a child list for field myData

i've been trying to run this code but this error always pops up!
here's my line of code

VB Code:

Dim myData As New DataSet
        Dim conn As New MySqlConnection
        Dim cmd As New MySqlCommand
        Dim myAdapter As New MySqlDataAdapter
 
        DataGrid1.DataSource = myData
 
        conn.ConnectionString = "server=localhost; uid=root; database=test"
        Try
            conn.Open()
            cmd.CommandText = "SELECT * from user"
            cmd.Connection = conn
            myAdapter.SelectCommand = cmd
            myAdapter.Fill(myData)
            DataGrid1.DataMember = "myData.Tables(0)"
        Catch ex As Exception
            MessageBox.Show(ex.Message, "Report could not be created", MessageBoxButtons.OK)
        End Try