Altering routing of user/login I have a use case where I need to adjust the landing of the route, user/login to direct to a custom developed user/register page once clicked. What's the quickest method of doing this without overloading the core User module with changes?
You can also use Login Destination module to redirect without touching any code


  The Login Destination module allows you to customize the destination
  that a user is redirected to after logging in, registering to the site
  (7.x), using a one-time login link or logging out (7.x). The
  destination can be an internal page or an external URL. It is possible
  to specify certain conditions like referring pages or user roles and
  make the destination depend upon them. You may use PHP snippets to
  provide custom conditions and destinations. It is also possible to
  keep users on the currently visited page after logging in or out.