title: How to deal with arbitrary amount of redirect URIs?
body: <p>I'm developing an application where the users have their own URLs, and they need to use Google API - of course with different redirect URIs, like</p>
  
  <ul>
  <li>www.example.com/johndoe/google/login</li>
  <li>www.example.com/foobar/google/login</li>
  </ul>
  
  <p>So first I thought I could simply solve this problem by using wildcards (www.example.com/*/google/login), but it unfortunately doesn't work that way. Then I started to code a simple proxy in Perl, but I'm not sure it would work and we're running out of time. What is the best way to deal with the situation? I thought about adding a new redirect URI to the console from the registration handler, but I didn't find any way the server could do this.</p>