feat(Application): tidy up code

src/structures/interfaces/Application.js

@@ -80,30 +80,30 @@ class Application extends Base {
    * @param {string} guild_id The id of the guild that you want to invite the bot to
    * @param {bigint} [permissions] The permissions for the bot in number form (the default is 8 / Administrator)
    * @param {string} [captcha] The captcha key to add
-   * @returns nothing :)
+   * @returns {undefined} nothing :)
    */
   async invite(guild_id, permissions = 8, captcha = null) {
-    let res = await this.client.api.oauth2.authorize.post({
+    await this.client.api.oauth2.authorize.post({
       query: {
         client_id: this.id,
-        scope: 'bot applications.commands'
-      },
-      data: captcha ? {
-        captcha_key: captcha,
-        authorize: true,
-        guild_id,
-        permissions,
-      } : {
-        authorize: true,
-        guild_id,
-        permissions,
+        scope: 'bot applications.commands',
       },
+      data: captcha
+        ? {
+            captcha_key: captcha,
+            authorize: true,
+            guild_id,
+            permissions,
+          }
+        : {
+            authorize: true,
+            guild_id,
+            permissions,
+          },
       headers: {
-        "referer": `https://discord.com/oauth2/authorize?client_id=${this.id}&permissions=${permissions}&scope=bot`
-      }
+        referer: `https://discord.com/oauth2/authorize?client_id=${this.id}&permissions=${permissions}&scope=bot`,
+      },
     });
-
-    return;
   }
 
   /**