Simple registration form using Python Tkinter syntax error

Question

Hi I'm trying to run in my windows machine this code : https://www.geeksforgeeks.org/python-simple-registration-form-using-tkinter/

So I'm having this error:

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

I'm not sure why is this happening I think it could be the route that I'm using:

wb = load_workbook('C:\Users\Desktop\register\excel.xlsx')

Maybe is missing import the os. Some help please to run it