how can i give connection in windows authentication, i dont have any user id, and password in windows authenticationto the belocode

private void btnsubmit_Click(object sender, EventArgs e)
        {

            String connectionString = "server=...........;user id=....;password=....;database=abc";
            SqlConnection thisConnection = new SqlConnection(connectionString);
         
            

            thisConnection.Open();

            String thisQuery = "INSERT INTO abc (ID, Name, ContactNo, Email, Address) VALUES ('" + txtid.Text + "', '" + txtname.Text + "', '" + txtcontact.Text + "', '" + txtemail.Text + "', '" + txtaddress.Text + "')";
            SqlCommand thisCommand = new SqlCommand(thisQuery, thisConnection);
            SqlCommand cmd = new SqlCommand();

            thisCommand.ExecuteNonQuery();
            thisConnection.Close();

        }