I created a fan page for my business and since I don't have 25 people to create a unique URL, I'm using the non-unique URL (default Facebook URL).  I have provided the default Facebook page URL to my developers so that when users click the Facebook icon, they can go directly to my fan page.  However, instead of taking me directly to my fan page, it is redirecting users to the Facebook sign-in page instead of the fan page (if not already signed in).  Is the only way to go directly to a fan page based on having a unique username? Or is the default URL assigned at the creation of a fan page supposed to also allow direct access to the fan page?
Facebook fan page without custom URL redirects to login unless already signed in
facebook pages