Note what your customer sees: your logo and business name, your accent colour on the button, and “Need help? Message us on WhatsApp” underneath. There is no mention of GFXToolz anywhere.The page also carries Forgot password? and First time here? links, so a customer who cannot get in has a route that does not involve messaging you.
Test the sign-in page in a private window after changing it. Signed in as yourself, you will be redirected past it and never see what you shipped.