每次用户使用我的应用程序中的数据时，将它们存储在kivy

Question

我用Kivy创建了一个问题应用程序。我想在用户使用它时存储用户的答案。 例如。由用户1给出的答案，那么应该创建一个coloum作为user1，并且所有答案都存储为他们，如果user2使用app，则应该创建user2列，并且应该将所有答案存储为此类，等等。 我正在使用mongodb和pymongo

style.kv

<Screen1>:
    name: "screen1"
    FloatLayout:
        Label:
            text: "WHICH IS YOUR FAVORITE SWEET?"
            pos_hint: {"top": 1.2}
            font_size: 48
            color: 1,1,1,1
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            on_press: app.btn_pressed()

            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.2, "center_y":.4}
            text: "HALDIRAMS \n KAJU KATHALI"

            background_color: (0.0, 1.0, 1.0, 1.0)
            font_size: 18
        Button:
            on_release:

                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            on_press: app.btn_pressed()

            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.2, "center_y":.4}
            text: "HALDIRAMS \n KAJU KATHALI"

            background_color: (0.0, 1.0, 1.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            on_press: app.btn_pressed()

            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.4, "center_y":.4}
            text: "HALDIRAMS \n SONPAPDI"
            background_color: (1.0, 0.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.6, "center_y":.4}
            text: "HALDIRAMS \n BADAM HALWA"
            background_color: (1.0, 1.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.6, "center_y":.4}
            text: "HALDIRAMS \n BADAM HALWA"
            background_color: (1.0, 1.0, 0.0, 1.0)
            font_size: 18
        Button:
            on_release:
                app.root.transition = SlideTransition(direction="left")
                app.root.current = "screen2"
            on_press: app.btn_pressed()

            size_hint: 0.2, 0.8/3
            pos_hint: {"center_x":0.8, "center_y":.4}
            text: "HALDIRAMS \n RASGULLA"
            background_color: (0.8, 0.3, 0.4, 1.0)
            font_size: 18