fix: use const & specify which config was invaldi

backend/UserConfig.ts

@@ -112,9 +112,9 @@ export class UserConfig {
 
 		// * optional rate limit config
 		if (config.rateLimit != null) {
-			if (!Checkers.rateLimit.endpoint(config.rateLimit.login)) throw new Error('Invalid rate limit configuration');
-			if (!Checkers.rateLimit.endpoint(config.rateLimit.upload)) throw new Error('Invalid rate limit configuration');
-			if (!Checkers.rateLimit.endpoint(config.rateLimit.api)) throw new Error('Invalid rate limit configuration');
+			if (!Checkers.rateLimit.endpoint(config.rateLimit.login)) throw new Error('Invalid Login rate limit configuration');
+			if (!Checkers.rateLimit.endpoint(config.rateLimit.upload)) throw new Error('Invalid Upload rate limit configuration');
+			if (!Checkers.rateLimit.endpoint(config.rateLimit.api)) throw new Error('Invalid API rate limit configuration');
 		}
 
 		// All is fine, carry on!

backend/ratelimit.ts

@@ -5,7 +5,7 @@ import { rateLimit } from 'express-rate-limit';
 /**
  * map that contains rate limiter middleware for each group
  */
-let rateLimiterGroups = new Map<string, (req: Request, res: Response, next: NextFunction) => void>();
+const rateLimiterGroups = new Map<string, (req: Request, res: Response, next: NextFunction) => void>();
 
 /**
  * creates middleware for rate limiting