I think I tried all properties here:
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cognito-userpool.html
couldn't get this box checked:
My config currently:
CognitoUserPoolGeneral:
Type: AWS::Cognito::UserPool
Properties:
UserPoolName: general
Policies:
PasswordPolicy:
MinimumLength: 6
RequireLowercase: false
RequireNumbers: false
RequireSymbols: false
RequireUppercase: false
Schema:
- AttributeDataType: String
Name: preferredLocale
DeveloperOnlyAttribute: false
Mutable: true
Required: false
EmailVerificationMessage: "Here's your verification code: {####}. Please provide it inside the application."
EmailVerificationSubject: "subject"