Examples for endpoint /rest/api/latest/admin/users/remove-group incorrect.
https://developer.atlassian.com/server/bitbucket/rest/v807/api-group-permission-management/#api-api-latest-admin-users-remove-group-post
"context": "group_a", "itemName": "user_a"
"context": "user_a", "itemName": "group_a"
documentation error.