To integrate a SpreeCommerce store with Shippo, you need a Spree API token. You can create a Spree API token by logging into the Spree admin interface for your store.
Once logged into the Spree admin interface, click on USERS. You can then create or choose an existing account from the users list.
There should be an option to generate an API key for the selected user account.
This API token is needed to allow integration with Shippo.
Once logged into Shippo, you can connect your store by entering the Spree API key, Spree store url, and store name.