Need Help to a Python Error

C:\Users\sebastian\Desktop>e.py

Traceback (most recent call last):

File "C:\Users\sebastian\Desktop\e.py", line 233, in

ads = e.getremainingads()

File "C:\Users\sebastian\Desktop\e.py", line 155, in getremainingads

url = "https://www.eovendo.com/Home/GetUserAdInfo?userFirstName="+self.first

name+"&="+str(int(round(time.time() 1000)))

AttributeError: 'Eovendo' object has no attribute 'firstname'

What shall I do to fix this?