more work on social login

README.md

@@ -7,6 +7,7 @@ This README aims to document functionality of backend as well as required steps
 - [First Steps](#first-steps)
   - [Load location data](#load-location-data)
   - [Load taxonomy data](#load-taxonomy-data)
+- [Social Auth](#social-auth)
 - [Company Endpoints](#company-endpoints)
 - [Product Endpoints](#product-endpoints)
 - [Core Endpoints](#core-endpoints)
@@ -61,6 +62,26 @@ This data serves as initial Tags
 To load initial set of tags: `python manage.py addtaxonomy`
 
 
+
+## Social Auth
+
+Use your credentials from social media network to create acount and log in.
+
+Backend must be registered with every service that we want to use it with.
+
+During registration, provide a `Callback URL`, where the app can receive requests.
+You are given `client key` and `client secret` tokens, used to validate login requests.
+
+### Facebook
+
+- Go to `developers.facebook.com/`
+- click on `My Apps`
+- On `Add a New App`, click on `Website`
+- Click on `Create App ID`
+- On the next screen click on `Skip Quick Start`
+- grab the `App ID` and `App Secret`
+- in `Settings / Basic`, click on the button `+ Add Platform` and add a website, and other info
+
 ## Company Endpoints
 
 ### CompanyViewSet