topbar = Navbar(
'',
View('Welcome Page', ('welcome')),
Subgroup('Master',
    View('Option 1', ('config')),
    View('Option 2', ('config')),
    View('Option 3', ('config')),
    View('Option 4', ('config')),
    ),
View('Rename', ('add_case')),
View('Logout', ('logout'))
)
nav.register_element('top', topbar)


@app.route('/config', methods=('GET', 'POST'))
@app.route('/config/', methods=('GET', 'POST'))
@login_required
def config() -> str:
    return redirect(ContextURL('/config'))