The If else statement for Python's subprocess doesn't seem to work

Question

I created a simple script to locate a user on the local machine. Despite entering any characters in the input box, the answer remains the same. I am grateful for any assistance.

#!/usr/bin/python

import subprocess

user = input("Enter username : ")

result = subprocess.getoutput("getent passwd" + user)
if result:
 print(("found "+user+" user in this system."))
else:
 print((""+user+" is not found..."))