Retrieve data throught pointer!

I created a colomn in the users table and named “Informations” to register their informations and use a pointer to an other table named Informations. So for each user got his own row in information table.

Now, i use an http request to get the users login and then throught the login i want to retrieve the related informations of the logged user by his Id.

inside the http request i couldn"t get the Url code right !! so when the user logged in he find only his own informations and settings in the future.