Be sure that you're visiting the correct URL. The URL is: https://webmail.hoa.email. The screen will have the login fields as shown in the example below. 

Enter the full email address associated with the account you are signing into in the "Username" field. Include the part before and after the "@" sign, like [email protected].

Double-check the password you're entering. You can click on the eye icon in the "Password" field to see if the password has been entered error-free or not. If you'd like to reset the password, learn how here.