I've created a community, Public user can Register/login into community.
When Public user logged into community, salesforce provide the by default community landing page. Please check below Screenshot URL. http://prntscr.com/f3io4x
As per the above screenshot, when user click on setting, he will see the different option as per the below screnshot URL. http://prntscr.com/f3ioo5
Security setting has standard functionality to change Username/Password for the logged in User.
further pages of community will be like same customized vf page.
Now in this page can i write my custom functionality to change username/Password for logged in user.
is the way that I'm try to go, Is correct? Please suggest.