Support guest checkout when anonymous account creation is enabled

Well the Gitlab integration is broken so ignore the issue fork.

Patch attached.

Hi @KarlShea,

Thanks for the report for this particular configuration.

As noted in the read me (and also should be reported in the license dashboard), guest checkout is not supported currently.

Configure (or create) a checkout flow at admin/commerce/config/checkout-flows

This flow must set "Guest checkout: Not allowed" for the "Login or continue
as guest" pane.

More work would need to be done to support this, including:
1. Determining what would happen if "Create a new account for an anonymous order" is NOT enabled? (Maybe we allow guest checkout ONLY if this is enabled?)
2. Updating the dashboard to reflect this change.
3. Updating the read me to reflect this change.
4. Determine if there are any other issues that prevented this from being supported previously. (It might be that there aren't any other items to address, other than that listed here + the submitted patch.)

I saw the related issue so I thought maybe the dashboard/readme just hadn't been updated, but it seems that wasn't the case!

Determining what would happen if "Create a new account for an anonymous order" is NOT enabled? (Maybe we allow guest checkout ONLY if this is enabled?)

I believe it would function the same as it does without the patch, where the license is created but doesn't have a valid user assigned (since onPaid/onPlace aren't doing any checks either before creating the license.

I'll update the patch with changes to the dashboard/readme.

Determine if there are any other issues that prevented this from being supported previously. (It might be that there aren't any other items to address, other than that listed here + the submitted patch.)

I'm testing this with commerce_file and everything seems to work well!

I created a product variation type that assigns a role and it also worked with guest checkout.

Cannot see why we can enable the feature to support anonymous shopping with commerce_license. Every order have an email attached.

And for my usecase, i want to enable it for anonymous users, and add a token so it's possible på to send an email with the license code. Even though that the user cannot login to it's account.

Make sense ?