Hi @sprintshot_guy,
Can you log into the web app, go to the System Console (the first account you created should have access to this), go to Settings > Authentication > Email in the left side menu, and verify that Enable sign-in with email is enabled? That 400 error should only be returned when you've entered an incorrect email or username as the login_id.
Also, you don't need to specify the "name" property when calling the login API any more. It's not used any more so it's just getting ignored.