Update README.md

generate-jwt-key/README.md

@@ -6,21 +6,29 @@ See [the docs](https://docs.github.com/en/developers/apps/authenticating-with-gi
 ```
 npm install
 node generate-jwt-key.js --private-key /path/to/key
-curl -i -H "Authorization: Bearer $(node generate-jwt-key.js --private-key /path/to/key)" -H "Accept: application/vnd.github.v3+json" https://api.github.com/app
+curl -i -H "Authorization: Bearer $(node generate-jwt-key.js -i <app id> --private-key /path/to/key)" -H "Accept: application/vnd.github.v3+json" https://api.github.com/app
 ```
 
 ## Get Installation token flow
 ### Get Installations
 ```
-curl -i -H "Authorization: Bearer $(node generate-jwt-key.js --private-key /path/to/key)" -H "Accept: application/vnd.github.v3+json" https://api.github.com/app/installations
+curl -i -H "Authorization: Bearer $(node generate-jwt-key.js -i <app id> --private-key /path/to/key)" -H "Accept: application/vnd.github.v3+json" https://api.github.com/app/installations
 ```
 
 ### Get Token
 ```
-curl -i -H "Authorization: Bearer $(node generate-jwt-key.js --private-key /path/to/key)" -H "Accept: application/vnd.github.v3+json" https://api.github.com/app/installations/<installation id>/access_tokens
+curl -L \
+ -X POST \
+ -H "Accept: application/vnd.github+json" \
+ -H "Authorization: Bearer $(node generate-jwt-key.js -i <app id> -p /path/to/key)" \
+ -H "X-GitHub-Api-Version: 2022-11-28" \
+ https://api.github.com/app/installations/<installation_id>/access_tokens \
+ -d '{"repository":"<repo-name>","permissions":{"contents":"read"}}'
 ```
+*Note:* Permissions JSON object must match [these properties](https://docs.github.com/en/rest/apps/apps?apiVersion=2022-11-28#create-an-installation-access-token-for-an-app-permissions-object) and your App must be granted the scopes you requested
+
 
 ### Use Token like a PAT
 ```
-curl -i -H "Authorization: Bearer <token>" -H "Accept: application/vnd.github.v3+json" https://api.github.com/user
+curl -i -H "Authorization: Bearer <installation_token>" -H "Accept: application/vnd.github.v3+json"  https://api.github.com/repos/OWNER/REPO
 ```