How to Find a User’s First Login Date
Login to Google Apps Admin Console (http://admin.google.com) and go to Users > Click three vertical dot icon in the upper right corner > select Download users to download a csv file.
How to View when an Account was Created
Go to Google Apps Admin Console and sign in to the Google admin console. Please access the Directory API webpage in a new tab at https://developers.google.com/admin-sdk/directory/v1/reference/users/get
Click the link called ‘authorization’ which is underlined text. You should be able to see the option ‘Authorize requests using OAuth 2.0’ and press the authorize toggle button. Click ‘AUTHORIZE’ and then ‘Allow’
Scroll down to the Response section and you should be able to see a string of code that shows the creation date of the account user. This looks like (“creationTime”: “2015-02-23T23:27:32.000Z”).