Thank you Jason for your reply and solution. It's close but not quite what I was looking for though. Let me see if I can explain this better.
If they were on the About page and logged in, I would want them to return to the About page.
If they were on the Services page and logged in, I would want them to return to the Services page.
(And I have over 50 pages and a login link is on all my posts, so assigning specific values to each of the links isn't an option

)
Instead of directing them to one specific page is there perhaps some other code I could include that would say, take them a couple steps back to where they were on my site previously. Just one string that I could use in all my login links?
Sorry for the confusion.