Automatic Login on devices

[user-removed]

Plan

Free/Premium

Country

Germany

Device

(iPhone XS, iPad Air 3)

Operating System

(iOS 13)

My Question or Issue

Hello,

I have just a Question about the Security. I have two devices (iphone and iPad).

I installed on both Spotify on the same time. I already have an account, but for safty reasons I created a new Account (on my iPad on the Spotify-App). After I set everything up I wanted to login on my iPhone. I was a little suprised because I was already registered with this Account.

How can that be?

So I have been using Spotify for years and I never noticed the "feature".

The Question I have now is this normal? What devices am I still logged on too?

I'm now a little afraid that Spotify has automatically logged on to another device to which I don't want to be logged in now.

And what triggered the automatic registration? Is the registration saved in the iCloud? I haven't linked my Spotify account to my Apple ID. 

[user-removed]

Has nobody really any idea?