Okay, we're going to improve things a bit...

Set your variables like this:

%admin admin1 admin2 admin3
%admincode admincode1¤admincode2¤admincode3
%adminstatus adminstatus1 adminstatus2 adminstatus3

Code:
on *:text:*:?: {
  if ($1 == !login) {
    var %nick = $findtok(%admin,$nick,32)
    if (%nick) {
      if ($gettok(%admincode,%nick,164) == $2-) {
        if ($gettok(%adminstatus,%nick,32) == Off) {
          msg $nick .: Admin nickname: $nick . :.
          msg $nick .: Log in status: Logged in. :.
          msg $nick .: Log in code: $gettok(%admincode,%nick,164) :.
          set %adminstatus $puttok(%adminstatus,On,%nick,32)
        }
        else {
          msg $nick .: Already logged in :.
        }
      }
      else {
        msg $nick .: Invalid login :.
      }
    }
    else {
      msg $nick .: Your nickname: $nick $+ . :.
      msg $nick .: You're a admin?: No :.
      msg $nick .: You're not permitted to use this command :.
    }
  }
}


This will allow you to not duplicate everything for every nick you want to allow to use the command.

Note that you'll need to change any parts of the script that change the passwords, add/remove nicks, and change the status to Off when logging out. To do that, use the $puttok method above, or ask for help if you need it.

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