Registration

function solve(input) {
    input.shift();
    let count = 0;
    for (const iterator of input) {
        let text = iterator;
        let pattern = /U\$(?<user>[A-Z][a-z]{2,})U\$P@\$(?<pass>[a-zA-z]{5,}[\d$]+)P@\$/g;
        let match = pattern.exec(text);
        if (match) {
            count++;
            let { user, pass } = match.groups;
            console.log('Registration was successful');
            console.log(`Username: ${user}, Password: ${pass}`);
        } else {
            console.log('Invalid username or password');
        }
    }
    console.log(`Successful registrations: ${count}`);
}
solve([
    '3',
    'U$MichaelU$P@$asdqwe123P@$',
    'U$NameU$P@$PasswordP@$',
    'U$UserU$P@$ad2P@$'
])