With most cases, you might have attributes are set as required and immutable in your user pool. You can use the CLI describe-user-pool to see the configuration information of the user pool. This could be the cause why you are seeing that error as Cognito is unable to update them with the new values. When you create a user through…

As you may know, there is a known issue that if you call AdminLinkProviderForUser API from PreSignUp lambda trigger to link a federated identity to an existing Cognito user, user federation fails in the first call. The follow up sign-in for the same user would be fine and return the linked user’s tokens or code. There is a workaround that…