Added bulk_trash_user method to move user/s to trash

[YevhenLys]

trafficstars

Description

Add post for bulk_trash_user that is currently missing

Motivation and Context

Decided to add this endpoint since there is a functionality, but the API request was absent.

How Has This Been Tested?

works in my environment, does not break anything pre-existing.

Types of Changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)