Do you mean saving after login or before login? It's might possible after login but before login it's not possible. Just make a ajax call on a point of time to save the data into database.
ocjp 6 — Feeding a person with food is a great thing in this world. Feeding the same person by transferring the knowledge is far more better thing. The reason is the amount of satisfaction which we get through food is of only one minute or two. But the satisfaction which we can get through the knowledge is of life long.