When I login at Authorize.net, here is what happens:
Since I know it works this way, I am in the habit of routinely skipping step 4 above; I am just describing it here for completeness.
This question is posed in the hope that it will help you with an example--I accept that this is just the way it is at this website.
1Password Version: 7.9.2
Extension Version: 7.9.2
OS Version: 10.15.7