Chapter 7 from Page no 165 to169

I am totally fed out with "Changing the authenticate implementation" Chapter 7 from Page no 165 to end of this chapter till page no. 169 nothing is working. not able to use login functions with database username(tbl_user)

and not able to resolve "Updating the user last login time" function.

totally blank, wasted too much time to run these functionality.

plz help me if you can do something.

Hi i got resolved this issue it was my mistake in my DB "tbl_user" field. now everything is working.