how to remove the background on text in tkinter python

1from tkinter import *
2from tkinter import messagebox
3import tkinter
4import hashlib
5from PIL import Image, ImageTk
6from win32api import GetSystemMetrics
7
8#===========================================================================================
9#functions to center windows
10def center_window_x(width):
11    x_coordinate = (GetSystemMetrics(0)/2) - (width/2)
12    return x_coordinate
13def center_window_y(height):
14    y_coordinate = (GetSystemMetrics(1)/2) - (height/2)
15    return y_coordinate
16
17
18#===========================================================================================
19#function to create setup page
20def first_time_setup(width, height):
21    setup_window = Tk()
22
23    #===========================================================================================
24    #remove window border and position in center
25    setup_window.overrideredirect(1)
26    setup_frame = Frame(setup_window)
27    setup_frame.pack_propagate(False)
28    setup_window.geometry('%dx%d+%d+%d' % (width, height, center_window_x(width), center_window_y(height)))
29
30    #===========================================================================================
31    #background image for setup window
32    canvas = Canvas(setup_window, width=width, height=height)
33    canvas.grid(columnspan=2)
34    image = Image.open("setup_background.jpg")
35    canvas.image = ImageTk.PhotoImage(image)
36    canvas.create_image(0, 0, image=canvas.image, anchor="nw")
37
38    #===================================================================================================
39    #add username label
40    start_title = Label(setup_window, text="Username")
41    start_title.place(x=430,y=225)
42
43    #===================================================================================================
44    #add admin user entry box 
45    admin_user_ent = Entry(setup_window)
46    admin_user_ent.place(x=500,y=225)
47
48first_time_setup(650, 300)
49