If you have reached this page, that means you probably cannot login to the Badlion Client with your Microsoft account currently. From what we have observed, this happens when you have a Microsoft account that is under the age of 18 and is not under a family plan.
There are currently two solutions:
1. Login to the Badlion Client with an adult Microsoft account. An adult Microsoft account is deemed as one where you are the age of 18 or older (e.g. your birthdate in the account settings makes puts you at the age of 18 or older).
2. You can add your Microsoft account to a family plan under one of your parents. You can read more about Microsoft family plans and how they work with your parents here: https://account.microsoft.com/family/
At this time we have reached out to Microsoft asking for more information on why this requirement is in place, but we have no other solution to provide users at the moment.
We thank you for your patience and understanding.