Uses PnP PowerShell to create an Office 365 Group (using an AAD app for Graph authentication) - completed.

Office365GroupCreatorThroughPnP_Complete.ps1

Write-Output "COB-O365-Group-VSCode: PowerShell Timer trigger function executed at:$(get-date)";

$currentDate = Get-Date -Format "ddd_dd_MM_hh_mm"
$groupPrefix = "COB_AutoCreatedGroup___"
$groupName = $groupPrefix + $currentDate

Write-Output "Will attempt to create group with name '$($groupName)'"

$appid = $env:AppID
$client_secret = $env:AppSecret
$tenant = $env:Tenant

Connect-PnPOnline -AppId $appid -AppSecret $client_secret -AADDomain $tenant

try {
    $group = New-PnPUnifiedGroup -DisplayName $groupName -Description $groupName -MailNickname $groupName -IsPrivate -Verbose
    Write-Output "Successfully created group '$($groupName)'"
} catch {
    Write-Error "Unable to create Group - exception details: $($_)" 
}