To delete/revoke Slack Authentication to re-authenticate in Salesforce, check the following steps: 1. Go to Settings. 2. Select Slack User Mappings. 3. Use Delete Action to Slack Authentication to re-authenticate in Salesforce. To re-authenticate, please check the following: https://www.infallibletechie.com/2022/10/how-to-authenticate-service-cloud-for-slack-salesforce-app.html