Well, you don't! All polls are managed through your password, which is used for things such as poll deletion.
Entering a password is not mandatory, but if you don't enter one, then you won't be able to modify your poll!
That's simple! Add something like the below code somewhere on your website. For the embed style, there's currently DefaultLight and DefaultDark.
<iframe src="https://pollbay.net/polls.php?id=[your poll id]&embed=1&estyle=[the embed style you want]" style="width: 100%; max-width: [max width. e.g. 500px]; height: [the height. e.g. 500px]; max-height: [the max height. e.g. 800px]; border: none;"></iframe>