title: Nodejs Loopback 4 add bearer token config into swagger explorer
body: <p>I'm using Nodejs loopback 4 to build API project and using JWT token for authentication component. But when I explore built-in swagger of loopback (localhost:3000/explorer as default) then navigate to one of my API url, there is no input place for JWT Bearer Token. How can I config that let swagger display a JWT token input (that's just like it's display param query, request body input...)
  Thanks in advance</p>