I couldn't find it on google so I came here with my question which is, Where can I see all of the devices that are logged in on my account, if atleast there is such a thing because I can't find it.
Thanks for reaching out to the Community. We're happy to shed some light on the situation.
While there is no page that will show you a list of all your logged in devices, you'll see an in-app notification when your account is being used somewhere else. We also send emails about new logins to help keep your account safe. If you see a login you don’t recognize, get help here.
In the past, it was possible to see all of your offline devices on your account page, but this option is no longer available. If you've reached the device limit, you'll get a pop up message saying "Device limit reached. Remove all downloads from another device to listen offline with this one."
To remove the downloaded content on a device you no longer need, simply go to Settings>Data-saving and offline>Remove all downloads. Another option would be to wait 30 days, since that's the maximum time a device can stay offline for before all the offline content on that specific device gets disabled.
In the meantime, if you're having difficulties with your downloads for offline listening, we'd recommend to check out this support page.
Hope this helps. Let us know if you have any other questions.
How do we go to the drop down box
not possible anymore
If you are worried about someone else being logged into your account you can change your password and then goto Spotify.com and sign out of all devices.