> ## Documentation Index
> Fetch the complete documentation index at: https://nango-wari-migrated-bigcommerce-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# Appstle Subscriptions - How do I link my account?
# Overview
To authenticate with Appstle Subscriptions, you need:
1. **API Key** - A key that grants Nango permission to interact with Appstle Subscriptions's APIs resources and services.
This guide will walk you through obtaining your API key within Appstle Subscriptions.
### Prerequisites:
* You must have an active Shopify subscription and have the Appstle Subscriptions app installed.
* Your plan must be upgraded to **Enterprise Plus** to enable the **API Access** feature.
### Instructions:
#### Step 1: Finding Your API Key
1. Login to your Shopify account.
2. In the Shopify Admin Dashboard, click **Apps**, search for **Appstle Subscriptions**, and open it.
3. Click **More** > **Integrations** > **API Access**, then scroll down to the **API Key** section.
4. Your **API Key** will be displayed. Click **Re-generate Key** if needed, then click the clipboard icon to copy it.
#### Step 2: Enter credentials in the Connect UI
Once you have your **API Key**:
1. Open the form where you need to authenticate with Appstle Subscriptions.
2. Enter your **API Key** in the respective field.
3. Submit the form, and you should be successfully authenticated.
You are now connected to Appstle Subscriptions.