Find TKB contributions for user via REST API

Hi,

Does anyone know if it's possible to retrieve the number of KB contributions a user has made via API? 

I'd like to display this in the User's message postbit...

Under Posts, Solutions, Kudos, also show "Contributions: " 

But I can't seem to find this value in the API docs.

<#assign authorKudos = rest("users/id/${author.id}/kudos/received/count").value />
<#assign authorSolutions = rest("users/id/${author.id}/solutions/received/count").value />
<#assign authorPosts = rest("users/id/${author.id}/posts/count").value />
<#assign authorDate = rest("users/id/${author.id}/registration_time").value />