OAuth backend configuration for Feathers v4

oauth-app.js

import _ from 'lodash'
import feathers from '@feathersjs/feathers'
import configuration from '@feathersjs/configuration'
import express from '@feathersjs/express'
import { AuthenticationService, JWTStrategy } from '@feathersjs/authentication'
import { LocalStrategy } from '@feathersjs/authentication-local'
import { AuthenticationProviderStrategy } from './AuthenticationProviderStrategy.js'
import { expressOauth } from '@feathersjs/authentication-oauth'

const app = express(feathers())
app.configure(configuration())
// Configure your app as usual (Express, Socket.io, etc.)
// ...
// Now configure local authentication and OAuth
const config = app.get('authentication')

const authentication = new AuthenticationService(app)
authentication.register('jwt', new JWTStrategy())
authentication.register('local', new LocalStrategy())

// Store available OAuth providers
app.authenticationProviders = _.keys(_.omit(config.oauth, ['redirect', 'origins']))
for (const provider of app.authenticationProviders) {
  authentication.register(provider, new AuthenticationProviderStrategy())
}
app.use(config.path, authentication)
app.configure(expressOauth())