What to know
Service accounts help prevent potential issues when connecting to a specific employee account.
Users Jira permissions are automatically respected by Jira Integration+
Service accounts can be used to limit access to the main user via Jira configuration. The main user is the user who initially connected your bot in Slack to your Jira instance.
There are also settings you can use to limit access via configuration.
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Note: Atlassian sometimes makes other users re-auth if the "main" user is changed. It has to do with how the OAuth keys work with the APIs and not something we can control. If your instance acts this way then users will be asked to re-auth on their next action.
How to set up
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Create the Jira account
Make this user an admin in Jira
Check Permissions Schemes for the following permissions have to be granted:
Browse Project
Create Issue
Comment on Issue
Edit Issue
Transition Issue
Add Attachment
Add the service account to the relevant Project Role in each project to ensure it has access to perform all actions
Scroll down to the "main authorized user"
Click "change"
Authenticate as that user (make sure it is not logged in as you).