Windows Xbox App sign in

I have recently purchased the xbox game pass on my windows 10 pc so I could play Sea of thieves. My xbox already has gold purchased so I am a bit confused? I load up Sea of thieves but it doesn't take me past the menu because it says you must sign into xbox
live to play this. I then go onto the Xbox app but when I load it up, it says we are unable to log you in, please try again later. I have tried multiple solutions but they don't work.

Please responds asap,

Thanks,

:)