Please excuse me if this seems incredibly obvious, but it's stumped me a couple times, and I always had to go and research how to get around this issue every time I've come across it. The scenario is ...

The Spotify error code 3 usually occurs when accessing the service from the website or the desktop app. It is caused by the use of an incorrect username or password ...

If you have recently changed the username of your Windows user account and started getting an error message saying No mapping between account names and security IDs ...