I hope I understand your question correctly - google translation is not very good with Chinese. You would like to find out your password? Go to your browser, where the password is saved, open "settings", then "password". There you should be able to view your saved passwords.
I'm very sorry for describing the problem using Chinese.
I can find my password with the chrome password manager but it may be a complex string of characters automaticly generated by google, so typing the password by hand may be very difficult. As a result, I would like to know that are there some methods that the geogebra app calls the browser to login because my password can be auto-filled by chrome, or this may be a new feature?
Auto-login is not possible yet with the phone app. You could go to https://accounts.geogebra.org and change your password there into something that is easier to type and remember.
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