How to code collision detection in Pygame to collide with an image?

Question

I've tried everything I can think of for this PyGame collision detection with the "maze.png" image. (player collides with maze) The player will still just go through the maze. This code is just the maze (image) in the position I want it and a player (rect) which can be moved with the arrow keys. Modify this code in any way to make the player collide with the maze. I need help! Thanks.

    #Imports needed libraries.
import pygame
#Initialises PyGame.
pygame.init()
#Sets window resolution, icon & title. Also gets required images.
win = pygame.display.set_mode((512,320))
pygame.display.set_caption("Maze Game")
window_icon = pygame.image.load("C:\\Users\\chizl\\Documents\\Images\\project_icon.png")
pygame.display.set_icon(window_icon)
level = pygame.image.load("C:\\Users\\chizl\\Documents\\Images\\bg-1.png")
#The necessary values for the player.
x = 48
y = 48
width = 16
height = 16
vel = 16
keys = pygame.key.get_pressed()
#While loop for window (put all code here).
run = True
while run:
    pygame.time.delay(128)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
    #Key presses.
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        x -= vel
    if keys[pygame.K_RIGHT]:
        x += vel
    if keys[pygame.K_UP]:
        y -= vel
    if keys[pygame.K_DOWN]:
        y += vel
        
    #Window properties.
    win.fill((255,255,255))
    win.blit(level, (0,0))
    pygame.draw.rect(win, (0,0,0), (x, y, width, height))
    pygame.display.update() 
    
pygame.quit()
#CL 2022