Hi,My team have the exact same problem, just in another context. But to be able to get the username and email again the Sign in token under Settings/<user name>/Password & Security/Apps Using Your ID/<app name>/Stop Using Apple ID, needs to be executed for deletion of the token on the device. It is our understanding that it is only the user of the device there are able to delete this // lets call it // Token.As long as the Token is on the device "Sign in with apple" will deliver Null. I guess if you want the user to log out then in some how the token must be deleted.If you are coding natively you could use the deviceid as a unique identifier and asume the users of the device is unique. In our case we cannot use this solution because of the unique issue and it is against our security policy.Our problem is a litte bit different though. The same issue happens when/if the user either deletes the app accedently or by some reason wants to reinstall the app. When deleting the app from the device the "Sign in with apple" is not being removed. When the user then logs in again we get Null values and we are not able to match the user to the users data. We think it is to complicated to instruct end users to delete the token from the device.We dont know if this is a bug from apple, or how to get around this problem.If anybody please advice.