The entrypoint for an interactive authentication request should be the /authorizeendpoint and not the /login one so even for the login flow you should not be using any direct links to the endpoint you mentioned.
A similar thinking is applied to the hosted reset password page; the entrypoint for a password reset should be the ticket URL provided through the relevant Management API endpoint or directly to the end-user email inbox. You may want to update your question with the exact use case you’re trying to accomplish.