fix bug

src/util/FetchRecommendedShards.js

@@ -0,0 +1,19 @@
+const superagent = require('superagent');
+const botGateway = require('./Constants').Endpoints.botGateway;
+
+/**
+ * Gets the recommended shard count from Discord
+ * @param {number} token Discord auth token
+ * @returns {Promise<number>} the recommended number of shards
+ */
+module.exports = function fetchRecommendedShards(token) {
+  return new Promise((resolve, reject) => {
+    if (!token) throw new Error('A token must be provided.');
+    superagent.get(botGateway)
+      .set('Authorization', `Bot ${token.replace(/^Bot\s*/i, '')}`)
+      .end((err, res) => {
+        if (err) reject(err);
+        resolve(res.body.shards);
+      });
+  });
+};