$SiteUrl = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
$UserName="xxxxxxxxxxxxxxxxxxxxxx"
$Password ="xxxxxxxxxxxxxxxxxxxxx"
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl)
$Context.Credentials = $credentials