How do you make specific players join certain teams/roles based on username?

I have been trying to do this for a while (the original script I tried eventually stopped working so now I have been trying to make a system for it) where based on someone's username they will go into a certain role/team.

I have used this (which is a ban list) from a youtube video and tested it on myself (and it works):

local message = "I do not forget..."
local banlist = {
    Phaibun = true,
}

game.Players.PlayerAdded:Connect(function(player)
    if banlist[player.Name] then
        player:Kick(message)
    else
        print("Do not trust them...")
    end
end)

So I tried reworking this to make turn it into what I am trying to do:

local miko = {
    WarEspmon19 = true,
    WarUmbmon12 = true,
}

game.Players.PlayerAdded:Connect(function(player)
    if miko[player.Name] then
        playerJoin.Team = "Miko"
    else
    end
end)

However this does not seem to be working. Any ideas on how to make it work?