When trying to get rid of the Spotify startup at the time of login, I found an interesting behavior: although its errors are not present in any of the known locations, such as Library / LaunchAgents and Library / LaunchDaemons, it is not configured as Open at startup either. of session in the Dock or during session closing, can still be started in some way.
I created a new test user, I started the application just once, I received a login message, I closed the application and decided that it would start from then. I tried to delete all the contents of the user's home folder in the Terminal while running as another user (rm -rf / users / testuser / *), but Spotify would start anyway.
I wonder how they do it? It is quite easy to verify by downloading and running the application, it is not necessary to create an account.
The point of the question is to understand the mechanism instead of stopping it from opening (there is a switch in the application).