Add-PnPFile with -Stream

[BassemNKhalil]

Hello,

I'm trying to build a Sync script to upload files from an external system to SPO. I'm trying to hook the response from web service that returns the document to an Add-PnPFile with Stream (to avoid saving files to local disk).

Basically if I do this, the file is uploaded to SPO but corrupted (opening PDF file shows an error and cannot be opened)
$fileStream = Invoke-RestMethod -Uri $fileUri -Credential $cred
$memoryStream = [IO.MemoryStream]::new([Text.Encoding]::UTF8.GetBytes($fileStream))
Add-PnPFile -FileName $name -Folder $DocLibraryName -Stream $memoryStream

If I do this instead (save the file to local path then read it from there) everything works fine
Invoke-RestMethod -Uri $fileUri -Credential $cred -OutFile $FilePathToSave
Add-PnPFile -Path $FilePathToSave -Folder $DocLibraryName

I'm assuming I need to use a different encoding or use a different stream other than IO.MemoryStream but I could not find any samples to suggest the right way of doing it.

Thanks,
B