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import * as oauth from '../src/index.js'
const issuer = new URL('https://example.as.com')const as = await oauth  .discoveryRequest(issuer)  .then((response) => oauth.processDiscoveryResponse(issuer, response))
const client: oauth.Client = {  client_id: 'abc4ba37-4ab8-49b5-99d4-9441ba35d428',  client_secret:    'ddce41c3d7618bb30e8a5e5e423fce223427426265ebc96fd9dd5713a6d4fc58bc523c45af42274c210ab18d4a93b5b7169edf6236ed2657f6be64ec41b72f87',  token_endpoint_auth_method: 'client_secret_basic',}
const parameters = new URLSearchParams()parameters.set('scope', 'api:read api:write')parameters.set('resource', 'urn:example:api')
const response = await oauth.clientCredentialsGrantRequest(as, client, parameters)
let challenges: oauth.WWWAuthenticateChallenge[] | undefinedif ((challenges = oauth.parseWwwAuthenticateChallenges(response))) {  for (const challenge of challenges) {    console.log('challenge', challenge)  }  throw new Error() // Handle www-authenticate challenges as needed}
const result = await oauth.processClientCredentialsResponse(as, client, response)if (oauth.isOAuth2Error(result)) {  console.log('error', result)  throw new Error() // Handle OAuth 2.0 response body error}
console.log('result', result)