Hi- slimmer of the week is the person who lost the most weight in the group that week. but they had to have either stayed the same or lost the week before- so you cant get it in your first week
depending on your group- you may have to stay in class to get sotw- in ours its just whoever lost the most weight- even if they didnt stay, but some groups insist you stay for the class after
congrats on your loss for the first week!