error when trying to subscribe to a websocket

[danieldflrss]

Hello, when I try to subscribe to a service through graphql, I get the following error:
TypeError: Cannot read property 'userHasPermissions' of undefined
on the file
node_modules@vendure\core\src\api\middleware\auth-guard.ts:81:14

A possible solution would be adding:
return parentType !== 'Query' && parentType !== 'Mutation' && parentType !== 'Subscription';
to the isFieldResolver function in the file vendure\core\src\api\middleware\auth-guard.ts

[martijnvdbrug]

Fixed in #1881