Revert Token change

Author: troettinger

Syndication/AzureStack.MarketplaceSyndication.psm1

@@ -57,7 +57,7 @@ function Sync-AzSOfflineMarketplaceItem{
     $registration = $registrations[0]
 
     # Retrieve the access token
-    $tokens = [Microsoft.IdentityModel.Clients.ActiveDirectory.TokenCache]::DefaultShared.ReadItems() 
+    $tokens = [Microsoft.Azure.Commands.Common.Authentication.AzureSession]::Instance.TokenCache.ReadItems()
     $token = $tokens |Where Resource -EQ $azureEnvironment.ActiveDirectoryServiceEndpointResourceId |Where DisplayableId -EQ $azureAccount.Context.Account.Id |Sort ExpiresOn |Select -Last 1