Follow the steps below to get the API path, Client ID, and Access token of BigCommerce.
1. Log in to the BigCommerce control panel and go to Settings.
2. Find the API Accounts section.
3. Click the Create API Account button.
4. Enter any Name for the app, copy API Path, and place it into the corresponding Migration field.
5. Under OAuth Scopes, choose Modify for all items.
6. Click the save button after making changes.
7. Copy API credentials ( Client ID and Access Token ) from the pop-up and put them in the corresponding fields on the Migration configuration page.