Update README.md

j178 · Mar 3, 2023 · 97be8c2 · 97be8c2
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@@ -7,7 +7,10 @@ A simple cli wrapper for ChatGPT API, powered by GPT-3.5-turbo model.
 
 ## Usage
 
+Get or create your OpenAI API Key from here: https://platform.openai.com/account/api-keys
+
 ```shell
+$ export OPENAI_API_KEY=xxx
 $ chatgpt
 ```