Как добавить screen в toolbar(kivymd), и так, чтобы скрывало сам toolbar, и открывало новый экран?

Question

[Dirollo]

В названии нифига не понятно, сейчас объясню. У меня есть код(будет ниже), и там я добавил Tabs, так же туда справа добавил кнопку сетингс, и мне нужно чтобы после нажатия открывался экран с настройками, и не было видно toolbar который я потом доделаю, но не работает

import pyowm
from pyowm.owm import OWM
from pyowm.utils.config import get_config_from

import subprocess

import sys
import requests
from bs4 import BeautifulSoup as BS

from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.lang import Builder
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import StringProperty
from kivy.core.text import LabelBase

from kivymd.uix.snackbar import Snackbar
from kivymd.font_definitions import theme_font_styles
from kivymd.uix.button import MDFlatButton
from kivymd.uix.button import MDIconButton
from kivymd.app import MDApp
from kivymd.uix.tab import MDTabsBase


config_dict = get_config_from('config.json')
owm = pyowm.OWM('ed3d1e950f0d1e73b26cfd7f55fbb4f9', config_dict)

mgr = owm.weather_manager()
sm = ScreenManager()

kv = """
BoxLayout:
    orientation: "vertical"

    MDToolbar:
        title: "Парсинг сайтів"
        title_font_style: 'Custom'
        md_font_style: 'FFont'
        
        MDIconButton:
	    	icon: "settings"
   		 theme_text_color: "Custom" 
    		md_text_color: 0, 1, 1, 1
    		on_press: app.stgs()
	    
    MDTabs:
        font_style: 'FFont'
        id: tab

<Lblv@MDLabel>:
	font_size: '20sp'
	halign: 'right'
	valign: 'middle'
	text_size: self.size
	font_style: 'FFont'
	bold: True

<Lblt@MDLabel>:
	font_size: '80sp'
	halign: 'left'
	valign: 'middle'
	font_style: 'FFont'
	bold: True
	
<ScreenManag>:
	wWindow:
	krvWindow:
	SettingsWindow:

<wWindow>:
	name: 'weather'
	FitImage:
		source: "Images/litev.jpg"
	FloatLayout:
	    id: fl	
		MDIconButton:
	    	icon: "check-bold"
	    	pos_hint: {'y': .89, 'x': .75}
	    	on_press: root.update()
	    	
		MDLabel:
			id: error
			font_style: 'FFont'
			text: ""
			pos_hint: {'y': .365, 'x': .4}
	FloatLayout:
		md_bg_color: 1, .4, .1, 1
		MDTextField:
	    	hint_text: "Назва міста/села"
	    	fill_color: 0, 0, 0, .4
	    	color_mode: 'custom'
	    	line_color_focus: 0, 1, 1, 1
	    	text: ""
	    	mode: "rectangle"
	    	id: ccity
	    	pos_hint: {'y': .90, 'x': .3}
	    	size_hint: .4, .067
	    	current_hint_text_color: 1, 1, .3, .8
	MDGridLayout:
		cols: 2
		size_hint: .9, .8
		md_bg_color: 0, .8, 1, .6
		pos_hint: {'y': .03, 'x': .05}
		MDBoxLayout:
		    spacing: 130
		    orientation: 'vertical'
		    padding: [100, 0, 0, 0]
		    Lblt:
		    	id: label
		        text: "Температура Зараз"
		    Lblt:
		        id: label2
		        text: "Мін/Макс Температура Сьогодні"
		    Lblt:
		        id: label3
		        text: "Вологість(%)"
		    Lblt:
		        id: label4
		        text: "Небo"
		MDBoxLayout:
			spacing: 130
			orientation: 'vertical'
			padding: [0, 0, 90, 0]
			Lblv:
		    	id: res
		    	text: "0.0"
		    Lblv:
		        id: res1
		        text: "0/0"
		    Lblv:
		        id: res2
		        text: "0%"
		    Lblv:
		        id: res3
		        text: "None"
		        text_color: 1, 1, 0, 1 
	        
	MDGridLayout:
		rows: 4
		size_hint_y: .8
		spacing: 210
		padding: 50
		pos_hint: {'y': .03, 'x': .03}
		MDIcon:
			icon: "temperature-celsius"
		MDIcon:
			icon: "thermometer-lines"
		MDIcon:
			icon: "water-percent"
	    MDIcon:
			icon: "weather-partly-cloudy"
			
<krvWindow>:
	name: 'krv'
	BoxLayout:
		MDIcon:
			icon: "youtube"
<SettingsWindow>:
	name: 'stg'
	BoxLayout:
		MDIcon:
			icon: "google"
"""

class krvWindow(MDTabsBase, Screen):
	pass
	
class SettingsWindow(Screen):
	pass

class wWindow(MDTabsBase, Screen):
	def update(self):
	    ciity = open('city.txt', 'r')
	    if (self.ids.ccity.text == ""):
	    	city = ciity.read()
	    	self.ids.ccity.text = str(city)
	    	ciity.close()
	    else:
	    	city = str(self.ids.ccity.text)
	    rt = 'https://sinoptik.ua/погода-' + str(city)
	    r = requests.get(rt)
	    html = BS(r.content, 'html.parser')
	    try:
		    for elms in html.select('#content'):
		    	t_min = elms.select('.temperature .min > span')[0].text
		    	t_max = elms.select('.temperature .max > span')[0].text
		    observation = mgr.weather_at_place(city)
		    w = observation.weather
		    l = w.temperature('celsius')['temp']
		    nt = w.temperature('celsius')['temp_min']
		    xt = w.temperature('celsius')['temp_max']
		    temp = str(l) + " °C"
		    answer = w.detailed_status
		    hum = w.humidity
		    mmr = str(hum) + "%"
		    self.ids.res.text = str(temp)
		    self.ids.res1.text = str(t_min + "/" + t_max)
		    self.ids.res2.text = str(mmr)
		    self.ids.res3.text = str(answer)
		    self.ids.error.text = ""
		    cwity = open('city.txt', 'w')
		    cwity.write(city)
		    cwity.close()
	    except:
	    	self.ids.res.text = str("0.0")
	    	self.ids.res1.text = str("0/0")
	    	self.ids.res2.text = str("0%")
	    	self.ids.res3.text = str("None")
	    	self.ids.error.text = "Помилка"
	    	Snackbar(text = "Помилка, введіть правильну назву міста або села").show()

class ScreenManag(ScreenManager):
	pass

class MainWindow(MDApp):
    n = 3
    def build(self):
        self.theme_cls.primary_palette = "Teal"
        LabelBase.register(
            name="DataFont",
            fn_regular="Fonts/19439.ttf")
        theme_font_styles.append('DataFont')
        self.theme_cls.font_styles["DataFont"] = [
            "DataFont",
            18,
            False,
            0.15,
        ]
        LabelBase.register(
            name="FFont",
            fn_regular="Fonts/18685.ttf")
        theme_font_styles.append('FFont')
        self.theme_cls.font_styles["FFont"] = [
            "FFont",
            24,
            False,
            0.15,
        ]
        return Builder.load_string(kv)

    def on_start(self):
    	sm.add_widget(wWindow(name='weather'))
    	sm.add_widget(krvWindow(name='krv'))
    	sm.add_widget(SettingsWindow(name='stg'))
    	nms = ["Курс биткоина", "	Курс доллара и эвро", "Коронавирус", "Погода"]
    	w1 = self.root.ids.tab.add_widget(wWindow(text=nms[self.n]))
    	self.n -= 1
    	w2 = self.root.ids.tab.add_widget(krvWindow(text=nms[self.n]))
    	pass
    def stgs(self):
    	sm.current = 'stg'
    	

if __name__ == '__main__':
	MainWindow().run()