I am working on sharepoint server 2013 enterprise. and inside sharepoint designer 2013 & workflow 2010, i am trying to implement the following senario:-

1. I got a list workflow that get fired when an item is created.

2. I want to check if the user who created the item (which is the same as WorkflowContext:current User) belong to a sharepoint security group, If so to set a site column named Team to be equal = CM

3. and if the user does not belong to set the Team= IT.

here is my list workflow:-

I thought that the above will might work in a way or another but it did not. so can anyone adivce on this please?