Login System in python , non hashed password , also stored in plain text

uandp=dict()
uandp['user']='uandp'
uandp['tool']='1234'

def login():
    username=input("Enter your username: ")
    if username in uandp:
        password=input("Enter your password: ")
        if password==uandp[username]:
            print("Login successful")
        else:
            print("Login failed")
            login()
    else:
        print("Invalid username")
        login()

login()