Merge pull request #9426 from tharindu-nw/master

Add description for setting access token via environment variable

swan-lake/development-tutorials/ballerina-central/publish-packages-to-ballerina-central.md

@@ -73,6 +73,12 @@ You can publish a Ballerina archive to the <a href="https://central.ballerina.io
     accesstoken="<token>"
     ```
 
+    If you are working in a context where it is not possible to save the `Settings.toml` file (e.g., within a CI/CD pipeline) you can set the access token via the `BALLERINA_CENTRAL_ACCESS_TOKEN` environment variable.
+
+    ```
+    export BALLERINA_CENTRAL_ACCESS_TOKEN="<token>"
+    ```
+
 > **Note:** The tokens remain valid for one year from the generation date. Upon expiration, you must generate a new token and update the `Settings.toml` file to avoid the unauthorized access error.
 
 ### Configure proxy settings (optional)