Add readme details closing #8; add contribs

readme.md

@@ -43,6 +43,21 @@ ChatGPT-Arcana isn’t on melpa or elpa. You can use use-package to install from
   :init (setq chatgpt-arcana-api-key "your-api-key-here"))
 ```
 
+You may wish to use `.authinfo` or similar to hold your API key. You can do this by creating or adding to your `~/.authinfo` file like the following:
+
+```
+machine chat.openai.com login YOUR_CHATGPT_EMAIL_HERE password YOUR_API_KEY_HERE
+```
+
+and using the line
+
+```elisp
+(setq chatgpt-arcana-api-key (auth-source-pick-first-password
+                                              :host "chat.openai.com"))
+```
+
+in your config.
+
 My own config adds a few extra parts that don't need to be part of the package.
 
 ```elisp
@@ -94,9 +109,14 @@ I have done exactly zero work in terms of compatibility. It works on my machine,
 
 ## Credits
 
-This package was developed by Carl Lange with judicious help from ChatGPT. 
+This package was developed by Carl Lange with judicious help from ChatGPT.
+
+Other contributors and contributions:
+- GitHub user [macownersclub](https://github.com/macownersclub) for [PR #6](https://github.com/CarlQLange/chatgpt-arcana.el/pull/6)
+- GitHub user [vxe](https://github.com/vxe) for authinfo tip in [issue #8](https://github.com/CarlQLange/chatgpt-arcana.el/issues/8)
 
 ## License
 
 This package is licensed under the [GNU General Public License v3.0](https://www.gnu.org/licenses/gpl-3.0.en.html).
-*Important note*: code generated by ChatGPT probably has a massive license headache attached to it and may result in RMS eating your dog.
+
+*Important note*: code generated by ChatGPT probably has a **massive license headache** attached to it and may result in RMS eating your dog.