Impact on the user:
- The user is confused and might not get a notification in slack
Steps to reproduce:
- Enable IA
- Go to Notification Channels
- Add slack channel with "#" in the channel name
- added to the system
- a warning about the format. something like : "no # needed "
- validation against the name
It is possible to create a notification channel for Slack with channel name #foo. We either should validate channel names and reject ones starting with #, or clean them in API handler.