has anyone successfully used cognito.NewUserPoolDomain()? I'm getting the following error returned from AWS: Custom domain is not a valid subdomain: Was not able to resolve the root domain, please ensure an A record exists for the root domain. despite an A record for the root domain existing.

@little-soccer-5693related to this? https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-add-custom-domain.html#cognito-user-pools-add-custom-domain-adding