Spotify has a setting for user login behaviour:
- Open preferences (command+,).
- Scroll down and click SHOW ADVANCED SETTINGS (their caps).
- Find the option Open Spotify automatically after you log into the computer, and set it to the desired option. Setting to no may not work if it’s been added to the start options. See the following steps.
- Open the System Preferences. In Users & Groups > Login Items, check if Spotify is there. If it is, hit the “minus” symbol. That’s it.