You need to authenticate with Evri before you can generate shipping labels.
Manual Authentication
Follow these steps to authenticate manually:
Go to www.evri.com and log in to your Evri account
Copy and paste the following URL into your browser address bar:
https://hermes-df-prod.eu.auth0.com/authorize?response_type=code&client_id=zyhpM8LlVFy3UmnVCPxy6WVUTcsTZVx0&redirect_uri=http%3A%2F%2Fwww.optimusuk.co.uk&audience=digital-futures-apis
After authorizing, you will be redirected back to this page
If you get an error page, look at the URL in your browser's address bar for a code= parameter
Copy the code value (everything after code= and before any & character or the end of the URL)
Paste that value into the field below
Important Notes
The authentication code is only valid for 72 hours
Each code can only be used once
If you encounter an error, try generating a new authentication code