How to configure loopback to use access_token in the header

Initialize Loopback Token Middleware check the docs

A sample code for enabling loopback.token middleware

app.use(loopback.token({  
  cookies: ['access_token'],
  headers: ['access_token', 'X-Access-Token'],
  params:  ['access_token']
  //additional keys (check docs for more info)
}));

It checks for these values in cookies, headers, and query string parameters