Added the support for Github OAuth

[yashrsharma44]

Added the support for Github OAuth -

• [x] User can click on the login button, and get logged in
• [x] Data of the logged in user is stored in gh_login_student.json file.
• [x] To get the college, I am using the id of the student.csv file, and mapping them to the user id.

Things which are not done -

• [ ] Use session object to provide the data of only the user's details
• [ ] Proper arrangement of files.

If any changes are required, please ask. cc / @dibyadas @djbarnwal @thealphadollar Pull Request for #49

[dibyadas]

LGTM!

[dibyadas]

@yashrsharma44 Can you just also comment the flow of OAuth so that it can be followed in the fronted.

[yashrsharma44]

Sure !

• There is a login button at the top-right corner, which I have connected to /auth and redirects to github login page
• User accepts the access/User makes a login through github.
• Page is redirected to /token, where it accepts the access token, and makes a request to get the details of the user.
• After getting the details, a session object is used for storing the name,id, data and access token, for future purpose.
• The data is then dumped out in json, after mapping the college name with user id in student.csv page.
• The page is redirected back to the main page.