Publish a project automatically in a workflow

Hi,
     I have a complex Project Server 2013 workflow. The workflow is created using SPD2013.



On some stages the workflow sets Custom project fields value. This value stays Draft until user hasn't publushed Project manually using PDP or Project Prof.



How I can autopublish a project in the workflow?



I've spend some time trying to use "Call HTTP Web Service" activity (REST endpoint /pwa/_api/ProjectServer/Projects('projectid')/Draft/publish) by I cannot make it work.



I've created a console application which publishes a project but how I can use it in a workflow?



Maybe I have overlooked some obvious solution.



Any help will be greatly appriciated?


Please help.

Thanks!

I didn't find the right solution from the Internet.

References:
social.technet.microsoft.com/Forums/projectserver/en-US/74852f0b-1f3a-494c-ac94-c8ca4e5ce746/publish-a-project-automatically-in-a-workflow?forum=projectserver2010general


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