How do I remove an incorrect autocomplete email address from AT&T login using Edge?

[Windows Central Question]

I have an annoying problem on the AT&T log-in page. It started a couple of days ago when I upgraded from Windows 7 to Windows 10. To log in I must first enter my email address. The first time I accidentally mistyped it and now every time I log in it offers (suggests) this incorrect email address as an autocomplete option. HOW DO I DELETE IT FROM AUTOCOMPLETE? I would actually prefer NO prompt at all. I do NOT check the box asking if I want AT&T to remember my email address and password. Again, how I remove this incorrect autocomplete email address prompt on the log-in page, and hopefully remove any email address prompts.