321401: Invalid credentials

Twilio could not authenticate the request because the client_id and client_secret you provided are invalid, do not match, or are not authorized for the requested operation.

• The client_id value is incorrect.
• The client_secret value is incorrect.
• The client_id and client_secret do not belong to the same credential pair.
• The client credentials were copied with extra spaces or formatting changes.
• The request is using OAuth client credentials that are not valid for the Twilio account or resource you are trying to access.

• Confirm that you are sending the correct client_id and client_secret values.
• Regenerate the client secret if you no longer have a trusted copy, then update your application with the new value.
• Make sure the credentials are passed exactly as issued, with no extra whitespace or truncation.
• Verify that your application is using the correct credentials for the correct Twilio account and environment.
• If you are using Twilio APIs that support OAuth, review your authentication setup and token exchange flow in Twilio IAM.

• Twilio IAM
• Verify API
• API authentication and security