How to create a login system.

Publicado el: 19 mayo 2026
en el canal de: Mr Skill Swapper

Building a login system in Python seems simple, but it's incredibly easy to make minor mistakes that completely crash your program!

In this video, I challenge you to a coding game. The first half of the video features a script with 4 critical beginner mistakes. The second half shows the fully working version—but I didn't explain the errors!

Can you spot the differences? Comment your guesses below! 🕵️‍♂️
(The full breakdown of the 4 mistakes drops in tomorrow's YouTube Short!)

👇 TIMESTAMPS:
0:00 - The Python Login Challenge
0:30 - Inspecting Section 1 (2 Hidden Errors)
1:10 - Inspecting Section 2 (2 Logic Traps)
2:00 - The Working Code Reveal (Testing it out!)
3:15 - The Ultimate Challenge & Outro

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❌ THE BROKEN CODE (Can you spot the 4 bugs?):
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user_database={ "skillswapper":"kljhg4w4w",
"reddy@1#2#w":"123ede" }
def login_system():
username=input("Enter username :").string()
if username not in the user_database:
print("user not found please sign up.")
attempts=5
while attempts is greater than 0:
password=input(f"password for {username}( {attempts} attempts left ")
if password == user_database[username]:
print (f"/n[succes] welcome back user, {username} access granted")
return

attempts-=1
print("incorrect password. try again. /n")
print("[locked]too many attempts. Access denaid")
if_name_="_maim_"

login_system()

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✅ THE CORRECT WORKING CODE:
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user_database = {
"skillswapper": "kljhg4w4w",
"reddy@1#2#w": "123ede"
}

def login_system():
username = input("Enter username: ").strip()

if username not in user_database:
print("User not found. Please sign up.")
return

attempts = 5
while attempts: # Loop runs while attempts remain
password = input(f"Password for {username} ({attempts} attempts left): ")

if password == user_database[username]:
print(f"\n[SUCCESS] Welcome back, {username}! Access granted.")
return

attempts -= 1
print("Incorrect password. Try again.\n")

print("[LOCKED] Too many attempts. Access denied.")

if _name_ == "__main__":
login_system()
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En esta página del sitio puede ver el video en línea How to create a login system. de Duración hora minuto segunda en buena calidad , que subió el usuario Mr Skill Swapper 19 mayo 2026, comparta el enlace con amigos y conocidos, en youtube este video ya ha sido visto 7 veces y le gustó 3 a los espectadores. Disfruta viendo!

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