Access token can be retrieve in different ways. This blog is explained the way you can get access token using cURL command. As a next step, I'm going to explain the way you can retrieve an access token using Advance REST client(Firefox plugin). Step 1 :- First create a service provider in WSO2 Identity server. Register a new application by providing callback url and allowed grant types. You must tick a password grant type because I'm going to get an access token using password grant type After above configurations are done. You can see the generated client key and secret as below Now you have client key and client secret for particular application. That means, you have completed the first step. Step 2 :- Get the base64 encoded value for client key and secret. before get the encoded value, client key and secret should be separated by colon. <client_key>:<client_secret> VbUbPR4a5c8wSIlRFfVq9j3UYCka:KBkyfyEtop2pOvOuiODCZIHqN0Ma This...