Protractor: How to expect browser url to equal url that have an id after registering new user?

I'm making some tests in Protractor and encountered a little problem:

I made a test to register a new user, when I finish registering it the url will be something like this:

#/user/592/profile

So, my question is, how can I manage to get the ID of the new user to get a true in my test? Something like this:

expect(browser.getCurrentUrl()).toEqual(browser.baseUrl+#/user/ID_OF_NEW_USER/profile);

How can I do this? If it's possible of course.