Feature: Basic wizard example (#35)

* adds basic example

* adds basic example

* resolves comments

examples/basic/index.js

@@ -0,0 +1,96 @@
+import express from 'express';
+
+const app = express();
+app.use(express.urlencoded({ extended: false }));
+
+//////////////////////////////////////////////////////////////////////////////////////////////
+// Basic example which serves as basis for code snippets for integration guides             //
+//////////////////////////////////////////////////////////////////////////////////////////////
+
+import { Config, SDK } from '@corbado/node-sdk';
+import { ValidationError } from '@corbado/node-sdk/errors';
+
+//////////////////////////////////////////////////////////////////////////////////////////////
+// Instantiate SDK                                                                          //
+//////////////////////////////////////////////////////////////////////////////////////////////
+
+// Configuration
+const projectID = '<Your Project ID>';
+const apiSecret = '<Your API secret>';
+const frontendAPI = '<Frontend API URL>';
+const backendAPI = '<Backend API URL>';
+
+// Create SDK instance
+const config = new Config(projectID, apiSecret, frontendAPI, backendAPI);
+const sdk = new SDK(config);
+
+app.get('/', async (_, res) => {
+  //////////////////////////////////////////////////////////////////////////////////////////////
+  // Protecting routes                                                                        //
+  //////////////////////////////////////////////////////////////////////////////////////////////
+
+  // Retrieve the short-term session value from the Cookie (e.g. req.cookies.cbo_short_session)
+  const shortTermSessionValue = '<Your short-term session value>';
+
+  if (!shortTermSessionValue) {
+    // If the short-term session value is empty (e.g. the cookie is not set or
+    // expired), the user is not authenticated. e.g. redirect to login page.
+
+    console.log('User not authenticated');
+    res.redirect('/login');
+  }
+
+  let user;
+
+  try {
+    user = await sdk.sessions().validateToken(shortTermSessionValue);
+
+    console.log(`User with ID ${user.userId} is authenticated!`);
+  } catch (err) {
+    if (err instanceof ValidationError) {
+      // Handle the user not being authenticated, e.g. redirect to login page
+
+      console.log(err.message, err.statusCode);
+      res.redirect('/login');
+      return;
+    }
+
+    console.error(err);
+    res.status(500).send(err.message);
+    return;
+  }
+
+  //////////////////////////////////////////////////////////////////////////////////////////////
+  // Getting user data from short-term session (represented as JWT)                           //
+  //////////////////////////////////////////////////////////////////////////////////////////////
+
+  user = await sdk.sessions().validateToken(shortTermSessionValue);
+
+  console.log('UserID', user.userId);
+  console.log('Full Name', user.fullName);
+
+  //////////////////////////////////////////////////////////////////////////////////////////////
+  // Getting user data from Corbado Backend API                                               //
+  //////////////////////////////////////////////////////////////////////////////////////////////
+
+  user = await sdk.sessions().validateToken(shortTermSessionValue);
+
+  const fullUser = await sdk.users().get(user.userId);
+
+  const fullName = fullUser.fullName;
+  const userStatus = fullUser.status;
+
+  console.log('User full name', fullName);
+  console.log('User status', userStatus);
+
+  // To get the email we use the IdentifierService
+  const identifiersList = await sdk.identifiers().listByUserIdAndType(user.userId, 'email');
+
+  console.log('Email', identifiersList.identifiers[0].value);
+
+  res.status(200).send('Success');
+});
+
+app.listen(8000, () => {
+  console.log('Server running on port 8000');
+});