Terminating your instance will destroy the root volume that was added at creation, so don’t do that yet!
Launching of new instances at Warwick is currently disabled because it is pretty full, but we should be able to enable launching briefly so that you can launch a new instance. Please send me a PM to let me know when this would be convenient for you?
The data in the explicitly added volume shouldn’t pose a problem. You can detach this from your instance now, ready to reattach to a new instance later.
For the automatically created volume, please use the “volume snapshot” function in the advanced interface to make a copy of the root volume of the instance that you have forgotten the credentials for. You can follow the guide here (specifically the “Taking a volume snapshot” section).
Once you’ve done this, create a new volume from the snapshot using the “Create Volume” button to the right-hand side of the page. When we’ve created a new instance, you can then attach this volume to extract the data.