post https://api.avionte.com/front-office/v1/departments/default-timesheet-approvers
Returns a Dictionary<int, List> called branch_default_timesheet_approvers, where branch_IDs are keys, and a List<mgr_id> is the value.Also returns a List nonexistent_branches. An empty List<mgr_id> means the branch may exist, but default timesheet approvers were not set.