improve note

src/controllers/api/loginController.ts

@@ -162,7 +162,7 @@ const createLoginResponse = (
         resp.CrossPlatformAllowed = account.CrossPlatformAllowed;
         resp.HUB = `${myUrlBase}/api/`;
 
-        // On live, the MatchmakingBuildId is a random 64-bit integer, but any string that is unique per build should do the trick.
+        // The MatchmakingBuildId is a 64-bit integer represented as a decimal string. On live, the value is seemingly random per build, but really any value that is different across builds should work.
         const [year, month, day, hour, minute] = buildLabel.split(".").map(x => parseInt(x));
         resp.MatchmakingBuildId = (
             year * 1_00_00_00_00 +