To provide greater visibility and control over your account security, the Sessions tab in the main menu includes a Session and Device Management panel. Here, you can immediately see which devices are active in the account, and view a timeline of recent sessions. To see your current sessions:
Sign in to your account.
Click on [Settings]
Select [Sessions]
Here, you can see current and previous sessions, their date, time, device and location/IP. By clicking [Revoke session], you can stop one or all sessions except the current.