Gmail setup

Hi guys .
I am currently using a gmail account configured in configuration.yaml for sending email through home assistant. I made all the steps in Google Developer and everything works.
Now I am trying to switch to the new notigy service so I have to remove my setup from congi.yamnl and add gmail in devioe and services.
The problem is ig I choose to add gmail I can’t configurate the password and user in home assistant but I am pointed to a page where I have to select an existing account , or create one , without the option to put the Gmail-created user pass.
What I am doing wrong?

I am trying to setup the integration remotely through Cloudflare don’t know it is the cause