Thank you for responding, I really appreciate the assistance.
I renamed the plugins folder located in wp-content. This “broke” the main site as expected but still did not allow me to log in.
To disable the theme I tried renaming the theme folder in wp-content, this resulted in the home page not displaying anything just white. However, it did not fix the login issue. What is the best way to temporarily revert back to standard WordPress?
Regarding the page access method, I have only ever logged in via typing url/wp-admin, it hadn’t even crossed my mind to check the main page for login.