Xbox One Live Download Screen

When I go to install FS2020 by clicking on my pre-order for PC, it brings up an Xbox One Live screen that gives me the option to “Play” or “Change Account”. I have two accounts to choose from, Google or Microsoft. If I change the account to Microsoft and sign in to that it brings me right back to the Xbox One Live sign-in screen. The thing is it lists my grandsons account name for Xbox One Live! I am not a user of Xbox One Live. I ordered and paid though Microsoft. Some say to just click on Play, but when I do that Microsoft tells me it will check my Xbox One account details and prompts me to proceed. Is it okay to go on through with this using my grandson’s account name? Any other way for me to do this correctly? Thanks in advance.