I don’t think I’ve ever used that before. I’d be curious to see if someone has any example code they’d be willing to share. If I need to pull from secure blob, I usually use a PowerShell command to general the entire SAS token URL and pass it in as a parameter.
This is the only way I could get the lcm options to work 
The old way doesn’t work for our subscription for unknown reasons. Kinda odd, I would think this would be a breaking change for other customers. Though the documentation does state that the old format is automatically converted. ¯_(ツ)_/¯