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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def login(self, came_from=lurl('/')):
 """Start the user login."""

        login_counter = request.environ.get('repoze.who.logins', 0)
        if login_counter > 0:
            flash(_('Wrong credentials'), 'warning')
        return dict(page='login', login_counter=str(login_counter),
                    came_from=came_from)