function ReadData {
    Param (
    [string]$username
    )
    $DBServer = "WUSAZEATEQADB01"
    $DBName = "Helpdesk_UserTool"
    $sqlConnection = New-Object System.Data.SqlClient.SqlConnection
    $sqlConnection.ConnectionString = "Server=$DBServer;Database=$DBName;Integrated Security=False;User Id = HelpDesk_User;password = ZECqBDz1"

    $query = "SELECT EmpId FROM Employee WHERE UserName = @un;"

    $sqlCommand = New-Object System.Data.SqlClient.SqlCommand
    $sqlCommand.Connection = $sqlConnection
    $sqlCommand.CommandText = $query

    $sqlCommand.Parameters.Add("@un", $username)

    $sqlConnection.Open()
    $result = $sqlCommand.ExecuteReader()
    $sqlConnection.Close()

    Write-Host $result

}