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With username and password which I create in the database previously. The authentication is very simple just to match username of the user's name.
After that, click save button to save new email address and then the page refreshes itself to show new email address.
I wrote a simple unit test to test edit email form. I tried to use selenium to test the view to edit email but failed.Because the modal is triggered by clicking a button and there's always an exception that the form is not visible and interactable.I don't know how to make it visible yet.