http-client-oauth2.bal

import ballerina/http;

http:Client webAppClient = check new("https://localhost:9090",
    auth = {
       tokenUrl: "https://localhost:9443/oauth2/token",
       clientId: "FlfJYKBD2c925h4lkycqNZlC2l4a",
       clientSecret: "PJz0UhTJMrHOo68QQNpvnqAY_3Aa",
       scopes: ["customer"],
       clientConfig: {
           secureSocket: {
               cert: "/path/to/sts-public.crt"
           }
       }
    },
    secureSocket = {
        cert: "/path/to/public.crt"
    }
);