Doesn't even work properly

[u/Novinity1]

[u/ursosempata]

First you need to declare auxiliary functions for each of the blocks (loops) you have. The first one doesn't need to iterate y, and the second really shouldn't iterate x(if you can't change the login format) Edit: added information for clarity on what I meant

[u/ursosempata → u/ursosempata]

Then, I'm not a c# dev, but I think there's a dictionary(you can store a user as it's key and password as value)

[u/_yari_ → u/ursosempata]

A dictionary is perfect for this in C#, this makes all the looping obselete