Steps to Reproduce:
  1. Navigate to https://www.nexlog.gg/decks
  2. Create Deck
  3. Click Flexslot Import tab at the top of the modal
  4. Click the blue Connect to Flexslot button
Expected Behavior: Account links
Actual Behavior:
The following error is returned:
"Cannot authorize this application
The redirect_uri does not match any URI registered for this OAuth2 client (loopback redirects match any port; all other URIs must match exactly).
FLEXSLOT_OAUTH2_INVALID_REDIRECT_URI".