Remove All Databases From Azure Analysis Server With PowerShell

Question

Ok I have this script, it should be straightforward:

# Load the Microsoft.AnalysisServices assembly from the NuGet package
$amoPath = (Join-Path (Join-Path $env:USERPROFILE ".nuget\packages\microsoft.analysisservices.tabular") "13.0.2150.3\lib\Microsoft.AnalysisServices.Core.dll")
Add-Type -Path $amoPath

$amoPath = (Join-Path (Join-Path $env:USERPROFILE ".nuget\packages\microsoft.analysisservices.tabular") "13.0.2150.3\lib\Microsoft.AnalysisServices.Tabular.dll")
Add-Type -Path $amoPath

# Connect to the AAS instance
$connectionString = "Provider=MSOLAP;DataSource=asazure://eastus.asazure.windows.net/myservernamehere;User ID=BlahBlah;Password=SuperSecretPassword;Persist Security Info=True;Impersonation Level=Impersonate;"

$server = New-Object Microsoft.AnalysisServices.Tabular.Server
$server.Connect($connectionString)

# Delete all databases in the server
foreach ($database in $server.Databases) {
    Write-Host "Deleting database: $($database.Name)"
    $database.Drop()
}

# Disconnect from the server
$server.Disconnect()

And of course it isn't:

Exception calling "Connect" with "1" argument(s): "The connection string is not valid." $server.Connect($connectionString) CategoryInfo : NotSpecified: (:) [], MethodInvocationException FullyQualifiedErrorId : ConnectionException

The funny part is I can do the same thing in C# with the same connection string, without any issues...

using (Server server = new Server())
{
    server.Connect(serverConnectionString);

    // Collect databases to drop in a separate list
    List<Database> databasesToDrop = new List<Database>();

    foreach (Database element in server.Databases)
    {
        databasesToDrop.Add(element);
    }

    databasesToDrop.AsParallel().ForAll(element =>
    {
        element.Drop();
    });
}

I am at a lose for what the issue is, what is wrong with the connection string?

I've tried messing around with different authentication methods, same issue really, works in c#, doesn't work in powershell...