Simple Client Credentials test with node-openid-client

cc-test.js

const OpenIdClient = require("openid-client");
const identityUrl = "http://127.0.0.1:3000/";

const clientId     = "user1";
const clientSecret = "password";

async function GetAccessToken() {

    var issuer = await OpenIdClient.Issuer.discover(identityUrl);

    const client = new issuer.Client({
        client_id: clientId,
        client_secret: clientSecret,
        response_types: ['id_token'],
        grant_types: [ "implicit",  "authorization_code" ], 
        application_type: "native"
    });

    var  grantResponse = await client.grant({
        grant_type: 'client_credentials',
        scope: 'openid profile'
    });

    var  accessToken = grantResponse.access_token

    console.log(" The GrantResponse: " , grantResponse );
    console.log(" The Access token: " , accessToken );

    // Introspect the token now:
    const response = await client.introspect( accessToken );

    console.log( "----------- Token Introspection: ");
    console.log( response );

    console.log( "------------ User info: ");
    const userinfo = await client.userinfo( grantResponse );  // Or accessToken  <---- IT FAILS HERE with TOKEN NOT FOUND returned from the server
    console.log( userinfo );

}

GetAccessToken();