Editable embedded google doc

I'm creating a website to tutor people at my school, and I need to embed a google doc so that anyone who visits the page can edit after they log in with their google account ofc. The way I have it now, it is not editable but it does embed. Does anyone know how to do this, can it even be done? Here is what I have so far.

<iframe src="GOOGLE-DOC-URL" height = "1000" width = "1000"></iframe>

I made the page public and published it, I've done quite a lot of looking on this and found that adding "seamless" to the iframe statement used to work but now that is deprecated apparently and I tried that and it does not work. Thank you.