Slack
Step 1: Config Slack App
First, you need to create an app on Slack API. Give your bot/app the following OAuth permission scopes: chat:write, chat:write.public

Step 2: Get Bot User OAuth Access Token and Channel ID
Copy your Bot User OAuth Access Token for usage below.

Copy the Channel ID of the channel you want to post a message to. You can grab the Channel ID by right clicking a channel and selecting copy name

Step 3: Configure Casdoor Slack Provider
There are three required fields: App Key, Content, and Chat ID. The relationship between the fields and Slack is as follows:
| Name | Name in Slack |
|---|---|
| Secret key | Access Token |
| Chat ID | Channel ID |
| Content |
