Powershell incorrect running sequence - powershell

Question

Kinda new to powershell and trying to write scripts in general. Im trying to create a script that creates an AD user and then assigns that user a license.
However doesn't seem to matter what I do, the sync command I have doesnt execute before the waiting period; so it cant find the user to assign the license to.
Any ideas what Im getting wrong?
`$DCSync = 'DC01'
#Starts AD Sync
Invoke-Command -ComputerName $DCSync -scriptblock {
Import-Module ADSync
Start-ADSyncSyncCycle -PolicyType Delta
Write-Output "testing"
}
send-mailmessage -From "abc#test123.co.uk" -To "abcHelpdesk#test123.co.uk" -Subject "New user creation" -Body "Please connect to DC01 and authenticate to Office 365 to complete the user setup for $UserPrincipalName" -SmtpServer [REDACTED]
Start-Countdown -Seconds 5 -Message "Synchronizing changes to Office 365"
#Install-Module PowerShellGet
#Install-Module Microsoft.Graph -Scope CurrentUser
#Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
Connect-MgGraph -Scopes User.ReadWrite.All, Organization.Read.All
$MgUserID = Get-MgUser -UserId "$EmailAddress"
Update-MgUser -UserId "$MgUserID" -UsageLocation GB
Set-MgUserLicense -UserId $MgUserID -AddLicenses #{SkuId = "6fd2c87f-b296-42f0-b197-1e91e994b900" } -RemoveLicenses #()`
Write-Outpost "testing" always prints after the ADsync commands
Creating a user - assigning a license to newly created user
It just errors out because its not syncing to AD using the command so the user doesn't 'exist' yet

Answer 1

A couple of thoughts:
Try using Start-Sleep rather than Start-Countdown
If it isn't asynchronous, you can try running Start-ADSyncSyncCycle -PolicyType Delta using the -AsJob parameter, and then retrieve the status of that job using a while loop and not proceeding until the job is completed
If you have the e-mail address, then you can use a while loop to not proceed until the account is created, like:
while ($null -eq $MgUserID){
try {
$MgUserID = Get-MgUser -UserId "$EmailAddress"
}
catch {
$MgUserID = $null
}
Start-Sleep -Seconds 30
}