Question

Lab9B: User Authentication Build a program that authenticates the user login by asking the user for a username and a password. For this program, you are going to use a dictionary to store the user's data. This is not ideal but just for this lab we are going to use the user's username as the key and the password as the value for the username key. Requirements o The program must use a dictionary that stores the user password using the username as the key. o The program should be able to hold multiple user login information, 0 O The program should also feature a "registration" option that asks the user for a username and password and adds it to the dictionary. If the login fails by either incorrect username, incorrect password, or if the username does not exist in the dictionary, the program should output "Incorrect Username/Password" o If a login is successful, the program should show a different set of options: log out, change password, and exit 0 If the user chooses to log out, the program should go back to asking for login, register, or exit. o If the user chooses to change password, input the new password and update it in the dictionary. o The program stops if the user chooses to terminate it. 0 Do not worry with input validation or option validation, assume the user will always follow the correct program flow and input the correct options. Sample output #1: Choose an option 1- Login 2 Register E- Exit 1 [Login] Username: jdoe01 Password: 4321 Incorrect username/password! Choose an option 1 Login 2 Register E Exit 2

Lab9B: User Authentication
Build a program that authenticates the user login by asking the user for a username and a
password. For this program, you are going to use a dictionary to store the user's data. This is not
ideal but just for this lab we are going to use the user's username as the key and the password as
the value for the username key.
Requirements
o The program must use a dictionary that stores the user password using the username as the key.
o The program should be able to hold multiple user login information,
0
O
The program should also feature a "registration" option that asks the user for a username and
password and adds it to the dictionary.
If the login fails by either incorrect username, incorrect password, or if the username does not exist
in the dictionary, the program should output "Incorrect Username/Password"
o If a login is successful, the program should show a different set of options: log out, change
password, and exit
0
If the user chooses to log out, the program should go back to asking for login, register, or exit.
o If the user chooses to change password, input the new password and update it in the dictionary.
o The program stops if the user chooses to terminate it.
0
Do not worry with input validation or option validation, assume the user will always follow the
correct program flow and input the correct options.
Sample output #1:
Choose an option
1- Login
2
Register
E- Exit
1
[Login]
Username: jdoe01
Password: 4321
Incorrect username/password!
Choose an option
1
Login
2
Register
E
Exit
2

Added by Cindy B.

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