Before you start you need to create Sigfox account. You need Pycom device with Sigfox to get your Sigfox account. Follow these instructions.
Once you have you account setup and are logged in Sigfox backend, you need to create API credentials for Pybytes.
Click on GROUP → <your_company_name> → API ACCESS → New
In the form chose arbitrary name, select
LIMITED_ADMIN and Profile and click on Ok.
Copy Login and Password to the clipboard.
In Pybytes go to Settings → Sigfox API or follow this link then paste in the form.
Read more how to use Sigfox with devKit contract.
Read more how to use Sigfox with Custom contract.