How to add a Medium account to the FS Poster
Firstly you should to create your personal Application in Medium. Please visit this link and fill the contact form for getting your Personal Medium App:
You can write decription like this: “Please allow us to create Medium App. We want to publish our WordPress posts to medium automatically with this app” – and send your request. You should to wait when Medium support team will accept your request and will response you via email. It will take some days. After that you can use Medium.