Use slack as Identity provider in Aws cognito pool

Question

I want to use Slack as an Identity provider in the cognito pool for authenticating users in my application. I am trying with OIDC provider type but I am getting this error. https://repost.aws/questions/QURPfjsVRNT8GkkbLeCqJ6dw/aws-cognito-not-working-for-google-sign-in-says-the-value-of-attribute-is-an-empty-list-which-is-not-allowed

There is no documentation on using Slack with cognito. Can someone guide me on how to make this work?

Slack Side documentation followed: https://api.slack.com/authentication/sign-in-with-slack#discover

| OpenID   | Connect attribute |
|----------|-------------------|
| email    | email             |
| username | sub               |

Accepted Answer

### Update
I was getting this error because Slack was not sending the email attribute as required in attribute mapping. When I changed the email attribute to userName as the primary attribute, I got the user authenticated in Cognito.

It looks to be an issue from the Slack side rather than the cognito side.

Use slack as Identity provider in Aws cognito pool

Update

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