I can't change my password logout

I successfully created my account but i cant change my password after i logout

Click on “account page”


then type a new password i the password field
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and click “Update User”

This is after login. I am trying to change my password with my main account. And i can’t because I’am not login

I do not understand what you mean.
Do you need help resetting a password ? but you are already using gmail, simply login using the google button