Login to NordVPN on Linux with python script

[AGreenPig]

Hello! I am fairly new to both python and Linux so forgive me if my code is bad or this is in the wrong Forum.
My Problem:
I am on a Kali Linux Virtual Machine. I have a list of NordVPN accounts with password in the form email:password. Since NordVPN connections only work when under six people are using the account at once and the accounts are public and are being shared, I would like to write a script that:

1. Tries to login with the Email and Password (Goes to the next one if the password is wrong)
   
2. Tries to connect to a server in a specific country. If the connection fails or takes too long, it goes to the next account.
   
3. If the connection was a success, stop the program and print the used Email with password.
   

I am not 100% sure how to do this. I have written a script that looks like this:

import subprocess
import time
def checkConnection():
	cmd = ['nordvpn', 'c']
	proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

	o, e = proc.communicate()

	if "Connected" in o.decode('ascii'):
		return True
	else:
		return False

def tryConnection():
	cmd = ['nordvpn', 'c']
	proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
	time.sleep(2)
	if checkConnection() == True:
		print("Sucessfull Connection with:\n" + email +" " +password)
	else:
		print("Failed")
		cmd = ['nordvpn', 'logout']
		proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
			
		print("Logged out")
	
def loginWithPassword(email, password):
	cmd = ['nordvpn', 'login', '-u', email, '-p', password]
	proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
	print(proc)
	o, e = proc.communicate()

	if "is not correct" in o.decode('ascii'):
		print("Wrong password")
	else:
		tryConnection()

f = open("list.txt", "r")
for line in f:
	username = line.split(":")[0]	
	password = line.split(":")[1]
	print("--------------------------\nUsername "+username+", Password "+password)
	
	loginWithPassword(username, password)

But the connection just fails for every login. It could be a possibility that I have just set up NordVPN wrong, but I can manually login via the terminal.

Thanks for your help!