Excluding files from auto save (autoSave), in Visual Studio Code

I have just picked up the Visual Studio Code, and am not very familiar with how the settings should actually be.

I have been trying to exclude a file type from Auto Save but I am not able to get this to work. The auto save works, but the part which defines the exclusion does not work (It is basically suppose to exclude .liquid extension from autosave).

This is what I have done by far; in the settings.json file I added:

"files.exclude": {        
    "*.liquid": true
},
"files.autoSaveDelay": 1000,
"files.autoSave": "afterDelay"

All other override settings I wrote int the .json file are working property, but this one does not. Any help is greatly appreciated, thank you.