what should be the exact the connection string in the below code ( the database name is USER and the table name is also USER)

Imports System.Data.SqlClient
Imports System.Linq
Imports System.Data




Public Class Form

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'Dim conn As SqlConnection
        'Dim cmd As SqlCommand
        Dim rd As SqlDataReader
        Dim conn As New SqlConnection()
        Dim cmd As New SqlCommand()
        conn.ConnectionString = "Data Source=localhost;Initial Catalog=user;Integrated security=true"
        cmd.Connection = conn
        conn.Open()
        cmd.CommandText = "Select login,password from user where login='" & TextBox1.Text & "'and password='" & TextBox2.Text & "'"
        rd = cmd.ExecuteReader
        If rd.HasRows Then
            Welcome.Show()
        Else
            MsgBox("Invalid Login or Password")
        End If

    End Sub
End Class