added sliding window counter to ratelimitersetup

Author: jondeweydev

src/middleware/rateLimiterSetup.ts

@@ -1,5 +1,6 @@
 import Redis from 'ioredis';
 import { RateLimiterOptions, RateLimiterSelection } from '../@types/rateLimit';
+import SlidingWindowCounter from '../rateLimiters/slidingWindowCounter';
 import TokenBucket from '../rateLimiters/tokenBucket';
 
 /**
@@ -31,7 +32,7 @@ export default function setupRateLimiter(
             throw new Error('Sliding Window Log has not be implemented.');
             break;
         case 'SLIDING_WINDOW_COUNTER':
-            throw new Error('Sliding Window Counter algonithm has not be implemented.');
+            return new SlidingWindowCounter(options.windowSize, options.capacity, client);
             break;
         default:
             // typescript should never let us invoke this function with anything other than the options above