> ## Documentation Index
> Fetch the complete documentation index at: https://nango-tiktok-accounts-update.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Environment variables

> Access sensitive variables in your sync and action scripts.

## When should you use script environment variables?

Script environment variables are useful when you need to access sensitive credentials in your *syncs* or *actions*, that is not specific to a specific *connection*.

For example, if you have a Discord integration with a bot token, it will need to be used every time you want to send a Discord message, no matter for which *connection*. In this case, you can create an environment variable for this token and access it from your Discord *syncs* and *actions*.

## How can I use script environment variables?

Navigate to your "Project Settings" in your [dashboard](https://app.nango.dev) and add/edit the 'Environment Variables' section.

<Frame caption="Environment variables">
  <img src="https://mintlify.s3-us-west-1.amazonaws.com/nango-tiktok-accounts-update/images/env-vars.png" />
</Frame>

Once set, the environment variables will be accessible from your *sync* and *action* scripts by
using the [SDK](/sdks/node#get-environment-variables) or [REST API](/api-reference/sync/environment-variables).

<Info>
  Secrets are specific to your environment, so can have different secrets with the same name for your `dev` and `prod` environments.
</Info>