Add debug log for generated token in LoginController.

backend/src/main/java/com/alttd/altitudeweb/controllers/login/LoginController.java

@@ -95,6 +95,7 @@ public class LoginController implements LoginApi {
         }
 
         String token = generateToken(cacheEntry.uuid);
+        log.debug("Generated token for user {} with token {}", cacheEntry.uuid, token);
 
         cache.remove(code);