I have a flow that user (Human Task) can choose two ways: Valid Ticket and Invalid Ticket
To pass to valid way, i used a MinataskClient.Complete and it works.
But to go to invalid way, i try to used MinaTaskClient.fail, but this command not continue my task.

My question is:
1) Whats the bast way to invalidade a ticket and finish the flow?
2) Its possible to get the task inside Split Constaint? (I think in this possibility. I get the task and check if it status=='FAILED')

Thanks