Adding login instructions to the login page, while also being WCAG compliant.

Community Novice

It was requested that our login page have an instruction that states, "Please enter your JWCC account name and password below." above the login form.  I can do this easily with Javascript, but it would not be WCAG compliant because most screen readers cannot read the HTML that is generated by Javascript, since it does not load with the DOM, but instead is added after the DOM has loaded.  Is there any way text like this can be added to the Canvas login page, while also being WCAG compliant?