I'm trying to compare the username entered to the username in a file along with the password. The script can check the file and return whether its a match or not but whenever the username does not match, the while loop prints "...does not match..." for each user in the file rather than just once. Here's my code:

#! /usr/bin/perl
# CSC 310 Project # 3

#opening passwd file
open (PSWD, '<', 'passwd.txt');

#getting username and password
#converting username to lowercase if anything is entered in CAPS
print "Please enter your username: ";
chomp($userN = <STDIN>);
$username = lc($userN);
print "Please enter your password: ";

#hiding password 
system ("stty -echo");
chomp($passwd = <STDIN>);

#reading passwd.txt and assigning values
while ($lines = <PSWD>){
    ($user,$pswd,$userID,$groupID,$info,$home,$shell) = split ':', $li
+nes;

    #checking username entered vs that in the passwd file
    if ($username eq $user){
    print "Checking username... MATCH\n";
    
    #checking password entered vs that in the passwd file
    if ($passwd eq $pswd){
        print "Checking password... MATCH\n";
    }
    else{
        print "Password does not match!\n";
    }
    }
    else{
    print "\"$username\" does not match any users in our database!\n";
    }
}
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The last else statement is what keeps repeating through the while loop but I only want it to print once if the username does not match, not each time that it checks the username against the file. I tried 'last;' but that would kill the while loop immediately so when the username actually does match, it would print that it doesnt because it didnt match the first one in the file. Any help or reference to help is appreciated!

I know the identations are a little off, theyre perfect in my script though