Hi @juanfranblanco,
Welcome to the community 
The current relayers can be seen here: https://gsn.openzeppelin.com/relay-hubs/0xd216153c06e857cd7f72665e0af1d7d82172f494?listRelays=true
As an aside, there are multiple community members using your VSCode Extension (including me 
). Thank you for creating this awesome extension. 