To protect your user account, we encourage you to:

use a strong password that is unique to your Spotify account
never share your password with anyone
limit access to your computer and browser
log out once you have finished using the Spotify Service on a shared device
read more detail on protecting your account
You can log out of Spotify in multiple places at once by using the "Sign out everywhere" function on your account page. If other individuals have access to your Spotify account (for example if you've given them permission to use your account on a shared device), then they can access personal data, controls and the Spotify Service available in your account. It's your responsibility to only provide individuals with permission to use your account where you're comfortable sharing this personal data with them. Anyone else's use of your Spotify account may impact your personalised recommendations and be included in your data download. 9. Children
Note: This Policy doesn't apply to Spotify Kids, unless the Spotify Kids Privacy Policy says so. Spotify Kids is a separate Spotify application. The Spotify Service has a minimum "Age Limit" in each country.
What security measures do you use to protect my data?
To protect your user account, we encourage you to:

use a strong password that is unique to your Spotify account
never share your password with anyone
limit access to your computer and browser
log out once you have finished using the Spotify Service on a shared device
read more detail on protecting your account