added course link

Author: dtauer

README.md

@@ -1,6 +1,7 @@
+[![Frontend Masters](https://static.frontendmasters.com/assets/brand/logos/full.png)](https://frontendmasters.com/courses/ai-agents/)
 # Build an AI Agent from Scratch Workshop
 
-- Watch the workshop on [Frontend Masters](https://frontendmasters.com/workshops/build-ai-agent/). 
+- Watch the workshop on [Frontend Masters](https://frontendmasters.com/courses/ai-agents/). 
 - View the [course notes](https://clumsy-humor-894.notion.site/Agent-from-scratch-13554fed51a380749554c44aa8989406?pvs=4)
 
 ## Setup Instructions
@@ -31,3 +32,10 @@ Create an [API Key from OpenAI](https://platform.openai.com/settings/organizatio
 ```
 OPENAI_API_KEY='YOUR_API_KEY'
 ```
+
+OpenAI requires you to add a minimum of $5 USD credit to your account. Go to the [billing page](https://platform.openai.com/settings/organization/billing/overview) and add credits.
+
+![image](https://github.com/user-attachments/assets/6de27e21-8345-48a7-adf9-5dfee3e8e1c9)
+
+> [!NOTE]  
+> It can take up to 20 minutes for the credits to be available via the API. So if you get an `insufficient_quota` error, try again in a few minutes.