Share with friends

1. When user registers in the system, we generate a unique code for them.
2. The user generates a unique link.
3. The user distributes this link on their own to friends.
4. The recipient clicks on the link.
5. The recipient opens the link in their browser, regardless of the device they are using.
6. The recipient must enter their phone number.
7. Only after entering the phone number can the recipient download the app.
8. We store correlation between user and code owner.