Before you can connect your Walmart account, make sure your are approved as a seller on Walmart.
You should be able to login into seller.walmart.com and have a Secret Key in your Seller Center account. If haven't completed all of the steps in Walmart's application and approval process you will not be able to connect to Walmart.
Obtain application keys. Navigate to https://developer.walmart.com
- Click Login.
- Select the United States flag as the “Marketplace Seller Login.”
- Enter your seller.walmart.com credentials.
- Click API Keys Management on the left navigation and select "Production" tab for production keys or "Sandbox" tab for test keys.
Add Walmart.com Commerce Provider