I developed an Android application that uses GoogleAccountCredential to authenticate with Google and uses the Gmail API. For me, it works fine. I followed all the steps to create the application in an application console.
I installed the application on another phone of my friend and this doesn't work.
I checked my friend's Google account settings - account permission (https://security.google.com/settings/security/permissions) and the application doesn't show up there.
The question is: why the application doesn't show up there? What do I have to do to get my application work?
Thanks.