UserCustomAction in App Event Receiver

I have created one UserCustomAction in App Event Receiver which adds a link in Site Action (Gear) menu of host web. The link I want to put is the URL of a list in App web. 

I tried below two options:

1) customAction.Url = "~appWebUrl/Lists/Configuration List/Allitems.aspx?{StandardTokens}";

2) Uri appweburl = properties.AppEventProperties.AppWebFullUrl;

 customAction.Url = appweburl + "/Lists/Configuration List/Allitems.aspx?{StandardTokens}";

But both doesn't work.

How can I get the values of StandardTokens inside App event receiver?

Thanks in Advance!