temporarily disable login requirement for v25 (#1982)

## Description:

Need to disable login requirement to test the new login on purchase flow
in staging.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

src/core/configuration/PreprodConfig.ts

@@ -12,8 +12,12 @@ export const preprodConfig = new (class extends DefaultServerConfig {
     return "openfront.dev";
   }
   allowedFlares(): string[] | undefined {
-    return [
-      // "access:openfront.dev"
-    ];
+    return undefined;
+    // TODO: Uncomment this after testing.
+    // Allow access without login for now to test
+    // the new login flow.
+    // return [
+    //   // "access:openfront.dev"
+    // ];
   }
 })();