Log others out of My Sky

[Mogdog20]

How can I sign others out. One of my family that has a sim on my account is rolling all the data. I am happy to keep paying for the sim, but don't want them to be able to take all of the spare data. I have changed my signing in password for my Sky ID but they are still doing it. I need to sign them out. Thanks

[Mogdog20]

Just realised that (thanks to a previous reply) last month that I can go to 

Then go to this link:

https://skyid.sky.com/authorise/manage