How do i create a username and password login system that takes multiple accounts

Question

Andrew Cuaki 2022-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/1656050-how-do-i-create-a-username-and-password-login-system-that-takes-multiple-accounts

评论： Andrew Cuaki 2022-2-23

i need to create an app that is a log-in system for multiple people. As of now i can only do one password/username combination. how do i add more

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Les Beckham 2022-2-22

You are more likely to get a good answer for how to update your code if you show the code that you have now.

Andrew Cuaki 2022-2-22

在 MATLAB Online 中打开

password = app.PasswordEditField.Value;
            passworddef = 'password';
b=length(password); b1=length(passworddef);
username = app.UsernameEditField.Value;
            usernamedef = 'EmployeeA';
a=length(username); a1=length(usernamedef);
if(a==a1 && b==b1)

This is all i have so far i tried using the ";" and "or(...)" and "|" but they dont seem to work

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Answer 1

Benjamin Thompson 2022-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/1656050-how-do-i-create-a-username-and-password-login-system-that-takes-multiple-accounts#answer_902210

Use strcmp to compare string contents rather than their lengths. Not that MATLAB is probably not very secure for taking passwords from users and making sure memory is cleared to zero when memory is no longer needed. Or at least, use the hash function and only store passwords as hashed strings.

You can store multiple strings like user names or passwords using cell arrays, like:

>> usernames{1} = "Harry"

usernames =

1×1 cell array

{["Harry"]}

>> usernames{2} = "Sally"

usernames =

1×2 cell array

{["Harry"]} {["Sally"]}