Saw your post, @markmac60.
As mentioned by @Strega, you can share your Roku streaming player or Roku TV without having to share your account credentials. When you set up a feature called Guest Mode.
For full information on this, you can take a look at this link: How do I set up Guest Mode on my Roku® streaming device? | Official Roku Support
I would also highly recommend creating a Roku PIN for your account to avoid any further unwanted purchases on your Roku account in the future. For more information about using a Roku PIN, visit our Support page here: How to create or update the PIN for your Roku account
Hope this helps! Let us know if you have any other concerns.