The verifyContact state
Account confirmation occurs either using :
The verification email may end up in your spam folder. For real deployments, configure the user pool to use Amazon Simple Email Service to send emails from a domain you own.
Account confirmation needs a domain as it's added to the confirmation link.
https://domain.auth.eu-central-1.amazoncognito.com/confirmUser?client_id=69agshfavua6m4lb8t&user_name=gerardnico&confirmation_code=226603