The instructions are below. (You don't need to own Xbox for this, everything is done on a PC) 
Credits are credited to a PC or any other platform 
1 - Create an Xbox Account –xbox.com/en-US/live 
2 - Link your Ubisoft account to the Xbox – account.ubisoft.com/account-information 
❗️(If the game is on Steam, then you need to link Ubisoft to Steam and only then Ubisoft to Xbox)
❗️ 3 - After linking and creating an account, provide me with the data from 𝐗𝐛𝐨𝐱. (email and pass )