Only paid plans may bind custom subdomains. Failed to bind the custom
subdomain <SUBDOMAIN> for an unauthenticated client. Sign
up at: https://dashboard.ngrok.com/signup If you have already signed up, make
sure your authtoken is installed. Your authtoken is available on your
dashboard: https://dashboard.ngrok.com/get-started/your-authtoken
If you're having trouble resolving this error, please reach out to support@ngrok.com.
Binding a custom subdomain on the ngrok.io domain requires a paid plan. Once you sign up for a paid plan, we'll give you an authtoken that you'll add to your ngrok agent. This will allow you to use custom subdomains.
Sign up for a paid plan at https://dashboard.ngrok.com/signup You'll need the Basic plan or better.
Add the authtoken from your account dashboard to your ngrok agent in your terminal.