Hi @davtorgh
This is an enhancement request currently tracked internally as FMEDESKTOP-10416 because this web service comes from a package.
My recommendation would be to create a new oauth web service from scratch and copy most of the configuration (just change out what you need).
The easiest option might be to export that web service (xml) and then edit it in a text editor. Change the service name, for example:
<service_name>safe.google-sheets.Google Sheets</service_name>
to
<service_name>jen.google-sheets.Google Sheets</service_name>
You can then Import from File... when you're in the Manage Web Services dialog window. Import the file you just edited.