I want to logon using my facebook accont from my wifes iPad but it keeps defaultimg to her facebook

[sadzacm]

My wife recently signed up to free spotify and linked to her facebook. I have a premium account linked to facebook. Now whenever I try to logon from the Mac or Ipad using "logon with facebook" it picks up her account. This is causing issues with Sinos integeation as my playlists wont playcsaying "unable to play with account credentials". So few things. 1. Ability to be able to change devices to logon with facebook logon and 2. Get rid of her subscription as we only need one accoint. Thanks