Issue Summary

The Add members to incident Slack channel rule component action fails if more than one user is present on the smart value that is being added as a member.

Steps to Reproduce

1. Create an automation rule to Add members to incident Slack channel
2. On the channel members section of the rule component, use a smart value of a custom field, for example, Request participants.
3. Create an Incident
4. Add two or more request participants
5. Trigger the automation rule

Expected Results

The request participants/users are added to the incident channel as members.

Actual Results

If it's one request participant/user, it gets added to the channel. If it's more, it triggers the following rule error:

• We couldn't complete the Slack operation.

Workaround

Manually add the participants to the channel after the creation.