Yammer API Issue - Get Groups Showing Error

I am integrating yammer features in our app (web-front-end stack and using Yammer JS SDK). So, I want get all the groups of a login-ed user. Inorder to get all the groups, I have

Solution 1:

You should register an App in Yammer dev console, specify allowed origins, get an API key and send it along with request.

See https://developer.yammer.com/docs/api-requests for more info.