I have been trying to login to play grounded online for awhile now. I have the game through steam but when it prompts me to login with an xbox account it keeps trying to use an old account I dont even have access to. It wont even give me the option to login using my actual account though is the problem. Every time I click login to an xbox live account it takes me directly to that email and account I dont have anymore asking for verification to be able to login. 

Hello BlazzedDonut! You should be able to change the account you login by hitting Windows + G to open the gamebar. Once in the gamebar click the Gear (Settings), then go to Accounts, and logout. After that you should be able to log into a new account. If this doesn't work, I recommend reaching out to Xbox Support as they are better equipped to deal with Xbox Account issues. 

Thanks