Issue Summary

When creating a rule to add multiple users to a Slack incident channel, it will not add them if there is an inactive account, and it will not show any errors indicating that the issue is related to that inactive account. 

Steps to Reproduce

1. Create an automation rule to add multiple users to a Slack channel when an incident is created. 
2. Before creating the incident, disable one of the users who are in the list to add to the incident Slack channel. 
3. Create the incident to trigger the rule.

Expected Results

The active users should be added. Also, the system should remove the user automatically from any automations to prevent any issues. 

Actual Results

Since there's an inactive user, the rule will run but won't add any users, and logs will not show why. 

Workaround

Customer will need to go through the automation to find the inactive user and manually remove them.