To find the MWS Auth Token, log into your Seller Central account and navigate to the User Permissions page in the Settings.
Scroll to the bottom of this page and locate the Third party developer and apps section, from here click on Visit Manage Your Apps.
Once on the Manage your apps page you should see Seller Labs listed as an authorized developer.
To the right of the Seller Labs developer row you will see a small blue link, labeled View, under the MWS Auth Token column.
Click on View and you will be presented with your MWS Auth Token in the same cell.
*Important* - Once you have your MWS Auth Token, copy and paste it into a message and send to a Success Agent, via our in-app chat, or by email. You can email us directly at firstname.lastname@example.org.
Should Seller Labs show under the Revocation section, please re-confirm access and reply with the new Auth Token. We will be able to verify if MWS access is working as expected once we have received your reply.
Lastly, if you are unable to locate your MWS Auth Token, or your permissions do not look like this, please reach out to our Customer Success team for help!