I quit using Facebook in early 2014. I asked them to delete my account. Later, in 2017, I logged into Spotify for the first time ever, using the same email I had registered with Facebook in the past. Magically my account was restored and linked to Spotify.
After that I was sort of at a loss, but I did delete my account again this year after seeing a link on a thread here that claimed it would “really” allow me to delete my account. I still don’t trust it.