fix(cloud): quick fix the "cloud create user" command

I required field for the request payload was missing so the command
would fail.

This is just a quick fix that adds the field, but in general we need to:

- Update the api-types package
- Consider using the api client that ships with it
- Ensure we're testing Core and Cloud across versions

core/src/commands/cloud/users/users-create.ts

@@ -120,6 +120,7 @@ export class UsersCreateCommand extends Command<Args, Opts> {
     const usersToCreate = Object.entries(users).map(([vcsUsername, name]) => ({
       name,
       vcsUsername,
+      serviceAccount: false,
     }))
     const batches = chunk(usersToCreate, MAX_USERS_PER_REQUEST)
     // This pretty arbitrary, but the bulk action can create 100 users at a time