In order to be a member of an existing Slack workspace, you will have to join one first. In this notification provider, everything happens on a workspace which is a group of people using Slack together. For this reason it is best to add our notification app to your Slack channels and workspaces. You can install it by clicking the Add to Slack button.
In this case the authorization is based on a Slack token. The required token should appear on your screen after the installation.
When creating a Slack provider, you have to decide if you want the notification to be sent by a user or by a bot. If the Username field will be filled in and the As a user field will be marked false, the message will be sent by a bot with the name you have previously entered.
By clicking the Test Token button, you verify your Slack channel token and check if the notifications will be send properly.