Important Notes:

If the teams field is provided, it must contain valid team IDs belonging to the organization.
- If the empty array is passed, then the custom set will be accessible to all the teams in the organization
- If team ids are passed, only teams in the request can access the custom set (which means access from other teams will be revoked)
If an items field is included in the data property:
- All prior items in the custom set will be removed and replaced with the new set.
- The items will appear in the custom set in the same order they are specified in the array.
- Each item must include an item_name field, which is required.
- Other fields within each item (e.g., reference_id, score, color, is_flagged) are optional.

When to expect errors:

400 Bad Request:

401 Unauthorized

The provided API key is invalid or missing.
You attempt to update a custom set that you do not have permission to access.

404 Not Found