Error: group mongodb does not exist

[coffee-mug-24]

I got the error "Group mongodb does not exist" when running with the minimum config (see below).
Fixed it by adding a task group: name={{ mongodb_user }} before the role.

roles: - Stouts.mongodb vars: mongodb_user: mongodb

Environment was Amazon Linux.

[codewinkel]

You could also create pre_tasl
pre_tasks: - name: Create group group: name: "{{mongodb_user}}" state: present