Generate authentication token for accessing APIs

Steps to generate auth-token

Following are the steps to authenticate a user when the user is supposed to access any opensaber APIs.

Step 1 : Set environment variables

Linux/Mac OS - set following key-value pairs in your bash profile or /etc/environment
Windows(version 7 and above) OS- Control Panel->System and Security ->Advance system settings -> Environment Variables-> New (under System Variable section) 

Set these key-value pairs as environment variables

sunbird_sso_publickey = ******
sunbird_sso_realm=sunbird
sunbird_sso_url=https://dev.open-sunbird.org/auth/
sunbird_sso_username=******
sunbird_sso_password=******
sunbird_sso_client_id=admin-cli 

Step 2: Generate access token using the following command

curl -X POST https://dev.open-sunbird.org/auth/realms/sunbird/protocol/openid-connect/token -H 'cache-control: no-cache' -H 'content-type: application/x-www-form-urlencoded' -d 'client_id=admin-cli&username=******&password=******&grant_type=password'

Step 3: While accessing any API of opensaber registry, use the value of "access-token" from step 2 along with key as "x-authenticated-user-token" in HTTP header.