T-954157790482088: change from user.tagferId to user.uid

- in this context user.uid is the tagferId

src/ups/auth/handlers.js

@@ -110,7 +110,7 @@ function signup(req, res) {
   authDao.createNewUser(user).then( user => {
     const sessionId = authDao.createNewSessionId(user.uid);
     try {
-      profileDao.createInitialProfiles(profile,user.tagferId).then (() => {
+      profileDao.createInitialProfiles(profile,user.uid).then (() => {
           res.json({sessionId});
       }).catch((error) => {
         res.status(http.BAD_REQUEST).json({error});