connection.js

const path = require('path')

// Require Provider 
const LTI = require('ltijs').Provider

// Configure provider
const lti = new LTI('EXAMPLEKEY', 
            { url: 'mongodb://localhost/database' }, 
            { appUrl: '/', loginUrl: '/#', logger: true })


let setup = async () => {
  // Deploy and open connection to the database
  await lti.deploy({ port: 3000 })

  // Register platform
  let plat = await lti.registerPlatform({ 
    url: 'https://platform.url',
    name: 'Platform Name',
    clientId: 'TOOLCLIENTID',
    authenticationEndpoint: 'https://platform.url/auth',
    accesstokenEndpoint: 'https://platform.url/token',
    authConfig: { method: 'JWK_SET', key: 'https://platform.url/keyset' }
  })

  // Set connection callback
  lti.onConnect((connection, request, response) => {
    // Call redirect function
    lti.redirect(response, '/main')
  })

  // Set main route 
  lti.app.get('/main', (req, res) => {
    // Id token
    console.log(res.locals.token)
    res.send('It\'s alive!')
  })
}
setup()