How do I enable Slack for an account?
Canvas admins can enable the Slack feature option for a Canvas account. However, to enable Canvas notifications for all users within a Slack workspace, a user with Slack admin rights must create and install the Slack app to create a Bot Access Token. After the bot is created and verified, individual Canvas users can enable Slack as a Canvas contact method to receive notifications.
Enable Slack Feature Option
In Canvas, click the Settings link  in Account Navigation. Then click the Feature Options tab . Enable the Slack Notifications feature option .
Open Slack Apps
To configure Slack for all users in a Slack workspace, a Slack app and API key must be created.
To create a Slack app and API key, open api.slack.com/apps in your internet browser.
If necessary, log in to your Slack account.
Create New Slack App
Click the Create New App button .
Give the app a name in the App Name field . The app name will display to users in the Slack workspace.
Select your institution's workspace or the workspace the app should belong to in the Development Slack Workspace drop-down .
To create the app, click the Create App button .
Add OAuth Scope
Open the OAuth & Permissions page .
In the Bot Token Scopes section, click the Add an OAuth Scope button .
Use the Add permission by Scope or API method drop-down to select the im:write OAuth scope option .
To save and install the app, click the Install App to Workspace button.
Allow App Workspace Access
A message displays requesting permission for the app to access the Slack workspace.
Click the Allow button.
Copy Slack Bot Access Token
Once the app is created in Slack, click the Install App link .
Locate the Bot User OAuth Access Token and click the Copy button .
Add Slack API Token
In the Account Settings page in Canvas, locate the Slack API Token section and paste the copied token in the New Slack API Key field .
To save, click the Update Settings button .
Note: If the Slack API Key heading does not display, refresh your browser window.
Create Contact Method
In your user settings page, click the Add Contact Method link .
Click the Slack Email tab , and enter the email address of your Slack account in the Slack Email field .
Then click the Register Slack Email button .
Confirm Communication Channel
In Slack, look for a notification sent to the newly-created Slack App with a four-digit Canvas registration code .
In Canvas, enter the four-digit code in the Confirm Communication Channel field . Then click the Confirm button .
Once confirmed, all users in your Slack account can now add the Slack Email contact method and manage their Slack notification settings in the User Settings page.