Enable Google API for “googleapis.com/auth/userinfo”

I am developing a Google Chrome Extension. I would like to be able to access the user profile info, using the data from these endpoints:

https://www.googleapis.com/auth/userinfo

https://www.googleapis.com/oauth2/v1/userinfo

I don’t seem to have access to these resources. From my web searches, it looks like I may need to enable a library API in the Google Developers Console. But I looked there and cannot find an appropriate API to enable. Does anyone know which API I should enable?

Google Chrome Extension – Google Calendar Api Integration

I am new to chrome extension development. I need to invoke the Google Calendar Api’s from my Chrome Extension. I have few doubts in doing this.

  1. What is the type need to be selected in developer console(eg:-android)?
  2. What are the information need to be provided in creating the developer project?

I need to develop this with my locally loaded project. Please guide me.