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We’ve identified that some suppliers who generated their refresh tokens before we switched to non-expiring tokens may encounter token expiration after 365 days. This can lead to worker downtime and authentication errors such as: 
{"error":"invalid_grant", "error_description":"Unknown or invalid refresh token."}
Error: Authentication failed. Your token might be invalid or expired. Please re-generate one and try again. Use --no_cache=true flag to re-authenticate. To resolve this, please follow these steps to generate a new non-expiring refresh token and restart your worker: Step 1: Run the io.net worker CLI binary with the --no_cache=true flag to initiate token regeneration. Step 2: Provide any required details to the CLI. Once successful, your worker will launch using the refreshed token.
After completing the initial interactive authentication, you’ll see a new —token value. You can reuse this token to update other devices silently.
Thank you for your continued support of io.net. The io.net Team