# support-questions


04/21/2021, 3:46 PM
Two important points (since this is a one to many mapping - one userId of yours points to many userIds of ours): - If a supertokens' function returns a userId (even via session object), you would have to map that to your userId before continuing your API logic. - If you are passing a userId to any of our functions, you would have to make sure to pass all the mapped userIds to that function (by calling that function once per userId)