add multiple accounts docs

README.md

@@ -10,6 +10,7 @@ Repository version:
 
 - [Getting your cookie](#getting-your-cookie)
 - [Usage](#usage)
+- [Multiple Accounts](#multiple-accounts)
 - [Discord Webhook](#discord-webhook)
 - [FAQ](#faq)
   - [Is this safe?](#is-this-safe)
@@ -109,6 +110,16 @@ You have to check in manually first to get your cookie, follow these steps (clic
 
 10. You're set! Hop on your game the next day and see if you got the rewards
 
+## Multiple Accounts
+
+<details>
+  <summary>To add another account, you can repeat the steps above and append the variable names with number like below.</summary>
+  <img src="https://github.com/user-attachments/assets/8255c34f-1158-4649-a04e-f9d8c8475d46" />
+  <img src="https://github.com/user-attachments/assets/5befadd9-895e-46f5-8908-429edebdb67b" />
+</details>
+
+Supported variables are `COOKIE` and `COOKIE1` until `COOKIE5`. The same is for `GAMES`. That's up to 6 accounts!
+
 ## Discord Webhook
 
 You may use Discord webhook to send notifications to your channel!