How do I add friends to microsoft game of soda

shelleyscnnei

I started playing soda on FB. Someone told me about downloading the game from Microsoft so i and love it. I noticed that the amount of friends that i have on both games is different but i did have some in both. Many more on FB game. After opening the FB game, i went back to look at friends list in microsoft and they had now all disappeared. Now I have no friends in the microsoft game. Please tell me how i add friends to my microsoft game.