How do I save a leaderstat with a space in its name in a Datastore?

So I have a datastore and leaderboard script with three different stats in it and one of them has a space in it, how would I save that? Because with what I have, whenever I join in the game, edit the stats, then leave and rejoin the stats don't save, so maybe its the third stat?

local DS = game:GetService("DataStoreService")

game.Players.PlayerAdded:connect(function(plr)
    local ls = Instance.new("Folder",plr)
    ls.Name = "leaderstats"
    local cash = Instance.new("NumberValue", ls)
    cash.Name = "Cash"
    local rank = Instance.new("StringValue", ls)
    rank.Name = "Rank"
    local blocksm = Instance.new("NumberValue", ls)
    blocksm.Name = "Blocks Mined"
    local id = plr.userId
    cash.Value = DS:GetDataStore("cash"):GetAsync(id) or 0
    rank.Value = DS:GetDataStore("ranks"):GetAsync(id) or "Beginner Miner"
    blocksm.Value = DS:GetDataStore("blocksm"):GetAsync(id) or 0
end)
game.Players.PlayerRemoving:connect(function(plr)
    local id = plr.userId
    local ls = plr:FindFirstChild("leaderstats")
    if ls and id then
        DS:GetDataStore("cash"):SetAsync(id, ls.Cash.Value)
        DS:GetDataStore("ranks"):SetAsync(id, ls.Rank.Value)
        DS:GetDataStore("blocksm"):SetAsync(id, ls.BlocksMined.Value)
    end
end)

My game is FE.