Struggling with classes and CustomTkinter

Hello,

I am trying to get better at using classes but it’s been feeling elusive. I have a CTkinter class set up that creates the GUI for my program (I took the complex example from the repository and trimmed it down to my needs). Theres a scrollable frame that the class creates that I would like to insert image buttons into based on a API call. Essentially call API, parse data, insert into frame looping until the data is entered. I cannot figure out how to actually insert the data into the frame from outside of the class. When I run the program I get no errors but nothing gets added to the frame non the less. Thank you,

class App(customtkinter.CTk):
    def __init__(self):
        super().__init__()

        # configure window
        self.title("Reliable Bear")
        self.geometry(f"{1100}x{580}")

        # configure grid layout (4x4)
        self.grid_columnconfigure(1, weight=1)
        self.grid_columnconfigure((2, 3), weight=0)
        self.grid_rowconfigure((0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10), weight=1)

        # create sidebar frame with widgets
        self.sidebar_frame = customtkinter.CTkFrame(self, width=50, corner_radius=0)
        self.sidebar_frame.grid(row=0, column=0, rowspan=10, sticky="nsew")
        self.sidebar_frame.grid_rowconfigure(10, weight=1)
        self.logo_label = customtkinter.CTkLabel(self.sidebar_frame, text="Select Database", font=customtkinter.CTkFont(size=20, weight="bold"))
        self.logo_label.grid(row=0, column=0, padx=20, pady=(20, 10))

        self.sidebar_button_1 = customtkinter.CTkButton(self.sidebar_frame, text="Main",anchor="n", command=self.sidebar_button_event)
        self.sidebar_button_1.grid(row=1, column=0, padx=5, pady=5)
        self.sidebar_button_2 = customtkinter.CTkButton(self.sidebar_frame, text="Test", anchor="n",command=self.sidebar_button_event)
        self.sidebar_button_2.grid(row=2, column=0, padx=5, pady=5)
        self.sidebar_button_3 = customtkinter.CTkButton(self.sidebar_frame,text="New OAuth",anchor="n", command=oAuth_complete)
        self.sidebar_button_3.grid(row=3, column=0, padx=5, pady=5)
        self.sidebar_button_4 = customtkinter.CTkButton(self.sidebar_frame, text="Pull Open Orders", anchor="n",
                                                        command=lambda: get_open_orders(app, API_KEY, SHARED_SECRET,
                                                                                        SHOP_ID))
        self.sidebar_button_4.grid(row=4, column=0, padx=5, pady=5)
        self.sidebar_button_4 = customtkinter.CTkButton(self.sidebar_frame,text="Refresh Token",anchor="n", command=get_refresh_token)
        self.sidebar_button_4.grid(row=5, column=0, padx=5, pady=5)

        self.appearance_mode_label = customtkinter.CTkLabel(self.sidebar_frame, text="Appearance Mode:", anchor="w")
        self.appearance_mode_label.grid(row=6, column=0, padx=10, pady=(1, 0))
        self.appearance_mode_optionemenu = customtkinter.CTkOptionMenu(self.sidebar_frame, values=["Light", "Dark", "System"],
                                                                       command=self.change_appearance_mode_event)
        self.appearance_mode_optionemenu.grid(row=7, column=0, padx=10, pady=(1, 0))
        self.scaling_label = customtkinter.CTkLabel(self.sidebar_frame, text="UI Scaling:", anchor="w")
        self.scaling_label.grid(row=8, column=0, padx=10, pady=(1, 0))
        self.scaling_optionemenu = customtkinter.CTkOptionMenu(self.sidebar_frame, values=["80%", "90%", "100%", "110%", "120%"],
                                                               command=self.change_scaling_event)
        self.scaling_optionemenu.grid(row=9, column=0, padx=10, pady=(1, 0))

        # create main entry and button
        self.entry = customtkinter.CTkEntry(self, placeholder_text="CTkEntry")
        self.entry.grid(row=3, column=1, columnspan=2, padx=(20, 0), pady=(20, 20), sticky="nsew")

        self.main_button_1 = customtkinter.CTkButton(master=self, fg_color="transparent", border_width=2, text_color=("gray10", "#DCE4EE"))
        self.main_button_1.grid(row=3, column=3, padx=(20, 20), pady=(20, 20), sticky="nsew")

        # create textbox
        self.textbox = customtkinter.CTkTextbox(self, width=250)
        self.textbox.grid(row=0, column=1, padx=(20, 0), pady=(20, 0), sticky="nsew")



         # create slider and progressbar frame
        self.slider_progressbar_frame = customtkinter.CTkFrame(self, fg_color="transparent")
        self.slider_progressbar_frame.grid(row=1, column=1, padx=(20, 0), pady=(20, 0), sticky="nsew")
        self.slider_progressbar_frame.grid_columnconfigure(0, weight=1)
        self.slider_progressbar_frame.grid_rowconfigure(4, weight=1)
        self.seg_button_1 = customtkinter.CTkSegmentedButton(self.slider_progressbar_frame)
        self.seg_button_1.grid(row=0, column=0, padx=(20, 10), pady=(10, 10), sticky="ew")
        self.progressbar_1 = customtkinter.CTkProgressBar(self.slider_progressbar_frame)
        self.progressbar_1.grid(row=1, column=0, padx=(20, 10), pady=(10, 10), sticky="ew")
        self.progressbar_2 = customtkinter.CTkProgressBar(self.slider_progressbar_frame)
        self.progressbar_2.grid(row=2, column=0, padx=(20, 10), pady=(10, 10), sticky="ew")
        self.slider_1 = customtkinter.CTkSlider(self.slider_progressbar_frame, from_=0, to=1, number_of_steps=4)
        self.slider_1.grid(row=3, column=0, padx=(20, 10), pady=(10, 10), sticky="ew")
        self.slider_2 = customtkinter.CTkSlider(self.slider_progressbar_frame, orientation="vertical")
        self.slider_2.grid(row=0, column=1, rowspan=5, padx=(10, 10), pady=(10, 10), sticky="ns")
        self.progressbar_3 = customtkinter.CTkProgressBar(self.slider_progressbar_frame, orientation="vertical")
        self.progressbar_3.grid(row=0, column=2, rowspan=5, padx=(10, 20), pady=(10, 10), sticky="ns")

        #radio
        self.radiobutton_frame = customtkinter.CTkFrame(self)
        self.radiobutton_frame.grid(row=2, column=3, padx=(10, 20), pady=(10, 10), sticky="nsew")
        self.radio_var = tkinter.IntVar(value=0)

        # create scrollable frame
        self.scrollable_frame = customtkinter.CTkScrollableFrame(self, width= 250, label_text="Open Orders")
        self.scrollable_frame.grid(row=0, column=2,columnspan=2, rowspan=3, padx=(0, 0), pady=(0, 0), sticky="nsew")
        self.scrollable_frame.grid_columnconfigure(1, weight=2)
        self.scrollable_frame_switches = []


        # set default values
        self.appearance_mode_optionemenu.set("Dark")
        self.scaling_optionemenu.set("100%")
        self.sidebar_button_3.configure(hover= True)
        self.slider_1.configure(command=self.progressbar_2.set)
        self.slider_2.configure(command=self.progressbar_3.set)
        self.progressbar_1.configure(mode="indeterminnate")
        self.progressbar_1.start()
        self.textbox.insert("0.0", "")
        self.seg_button_1.configure(values=["CTkSegmentedButton", "Value 2", "Value 3"])
        self.seg_button_1.set("Value 2")

    def open_input_dialog_event(self):
        dialog = customtkinter.CTkInputDialog(text="Type in a number:", title="CTkInputDialog")
        print("CTkInputDialog:", dialog.get_input())

    def change_appearance_mode_event(self, new_appearance_mode: str):
        customtkinter.set_appearance_mode(new_appearance_mode)

    def change_scaling_event(self, new_scaling: str):
        new_scaling_float = int(new_scaling.replace("%", "")) / 100
        customtkinter.set_widget_scaling(new_scaling_float)

    def sidebar_button_event(self):
        print("sidebar_button click")

    def open_toplevel(self):
        self.toplevel_window = ToplevelWindow(self)

def display_receipts(app, response):
    receipts = {}
    app = App()
    print("running")
    for result in response['results']:
        receipt_id = result['receipt_id']
        print("running2")
        if receipt_id not in receipts:
            receipts[receipt_id] = {
                'buyer_name': result['name'],
                'created_timestamp': result['created_timestamp'],
                'transactions': []
            }
        transaction = {
            'title': result['transactions'][0]['title'],
            'created_timestamp': result['created_timestamp']
        }
        print("running3")
        receipts[receipt_id]['transactions'].append(transaction)
    sorted_receipts = sorted(receipts.values(), key=lambda r: r['created_timestamp'])
    frame = app.scrollable_frame
    frame.grid(row=1, column=1, rowspan=10, sticky="nsew")
    for i, receipt in enumerate(sorted_receipts):
        print("running4")
        label = Label(frame,
                      text=f"{receipt['buyer_name']}: {receipt['transactions'][0]['title']} ({receipt['created_timestamp']})",
                      font=('Helvetica', 10))
        label.pack(side="left")

def get_open_orders(app, API_KEY, SHARED_SECRET, SHOP_ID):
    SHOP_ID = int(SHOP_ID)
    url = f"https://openapi.etsy.com/v3/application/shops/{SHOP_ID}/receipts"
    config = {
        'host': 'localhost',
        'user': 'root',
        'passwd': 'ganfan',
        'database': 'tokens'
    }
    myDB = mysql.connector.connect(**config)
    myCur = myDB.cursor()
    myCur.execute("SELECT access_token FROM access_token")
    access_token = myCur.fetchone()
    access_token = ''.join(access_token)
    bearer = "Bearer"
    bearer_token = bearer+" "+access_token
    headers = {
        'x-api-key': API_KEY,
        'authorization': bearer_token,
    }
    data = {

        'client_secret': SHARED_SECRET,
        'code': access_token,
    }
    response = requests.get(url, data=data, headers=headers)
    # Parse the response as JSON
    response = json.loads(response.text)
    display_receipts(app, response)
    print(response)


def refresh_every_55():
    # code to run every 55 minutes
    while True:
        # Get the current time
        current_time = time.localtime()
        # Check if it's been 55 minutes since the last time the function was run
        if current_time.tm_min % 55 == 0:
            # Run the function
            get_refresh_token()
        # Wait for 3 minute before checking again
        time.sleep(180)

if __name__ == "__main__":
    app = App()
    app.mainloop()
    refresh_every_55()

You should make your example as small as possible and still illustrate the specific problem, and if possible, without using a 3rd party package, which I presume is customtkinter · PyPI.