This is a simple NodeJS backend demonstrating the authentication of Meetup and LinkedIn via oAuth 2.0.

• passport
• passport-linkedin-oauth2
• passport-oauth2-meetup
• dotenv
• express
• express-session

1. Download or clone this repo.
2. Create a Meetup oAuth consumer here.
3. Create a LinkedIn application here for leveraging its APIs.
4. Rename .env.sample to .env and paste your ClientID and ClientSecret keys created in the above steps.
5. Run $ npm install under the project root directory.
6. Start server: $ npm start
7. LinkedIn authentication: http://localhost:3000/auth/linkedin
8. Meetup authentication: http://localhost:3000/auth/meetup

After it's authencticated successfully, it will be redirected to http://localhost:3000/api with the following JSON response:

{
  message: "The authentication has been done successfully!"
}