How do I convert a Player Table value into a Define?

Sorry for bad title, but I don't really know how to explain it. I have a lobby / game system here, where whenever 1 player remains, they win. But I want to reward the player with +100 Cash on every win.

for _, player in pairs(game.Players:GetChildren()) do   --//Player Table

                if player.Team.Name == 'Players' then

                    .insert(playing, player.Name)
                    table
                end
            end

            if #playing == 0 then           --//# of Players Left.
                Status.Value = ' Everyone has died.'
                wait(3)
                break
            elseif #playing == 1 then
                Status.Value = (playing[1].. ' Has Won!')
                wait(3)
                for _, player in pairs(playing) do
                    print(playing)
                    local Winner = playing[1]
                    print(Winner)
                    local PlayerData = Winner.data.Cash.Value   -- Line 121
                    print(PlayerData)
                    PlayerData.Cash.Value += 100

here is my error;

?  {
     [1] = "joystuuu"
   }
   joystuuu
   ServerScriptService.Rounds:121: attempt to index nil with 'Cash'

PS. Heres the complete script if it helps.

--// Created:       2022-10-09  12:14AM
--// Last Edited:   2022-10-09  6:10PM


--//Variables
local DataStoreService = game:GetService('DataStoreService')
local myDataStore = DataStoreService:GetDataStore("myDataStore")



local RoundLength = 5
local IntermissionLength = 5
local InRound = game.ReplicatedStorage.InRound
local Status = game.ReplicatedStorage.Status


local LobbySpawn = workspace.Lobby_Spawn

local MapSpawn1 = workspace.Map_Spawn_1
local MapSpawn2 = workspace.Map_Spawn_2
local MapSpawn3 = workspace.Map_Spawn_3
local MapSpawn4 = workspace.Map_Spawn_4

local MapSpawnPoint = 0


--//Teleport on Round Start.
InRound.Changed:Connect(function()
    if InRound.Value == true then

        wait(1)
        for _, player in pairs(game.Players:GetChildren()) do           --//SPAWNING

            local char = player.Character

            if MapSpawnPoint == 0 then
                char.HumanoidRootPart.CFrame = MapSpawn1.CFrame
                MapSpawnPoint = MapSpawnPoint + 1
                print ('Now will spawn at: '.. MapSpawnPoint)
            elseif MapSpawnPoint == 1 then
                char.HumanoidRootPart.CFrame = MapSpawn2.CFrame
                MapSpawnPoint = MapSpawnPoint + 1
                print ('Now will spawn at: '.. MapSpawnPoint)
            elseif MapSpawnPoint == 2 then
                char.HumanoidRootPart.CFrame = MapSpawn3.CFrame
                MapSpawnPoint = MapSpawnPoint + 1
                print ('Now will spawn at: '.. MapSpawnPoint)
            elseif MapSpawnPoint == 3 then
                char.HumanoidRootPart.CFrame = MapSpawn4.CFrame
                MapSpawnPoint = MapSpawnPoint + 1
                print ('Now will spawn at: '.. MapSpawnPoint)
            elseif MapSpawnPoint ==4 then
                char.HumanoidRootPart.CFrame = MapSpawn4.CFrame
                MapSpawnPoint = 0
                print ('Now will spawn at: '.. MapSpawnPoint)
            end

        end 

        for _, player in pairs(game.Players:GetChildren()) do           --// TEAMS on game START
            local char = player.Character
            local Humanoid = char:WaitForChild('Humanoid')


            player.Team = game.Teams.Players
            Humanoid.Died:Connect(function()    --//Death during game
                player.Team = game.Teams.Lobby


            end)
        end
    else 
        wait(1)
        for _, player in pairs(game.Players:GetChildren()) do

            local char = player.Character
            player.Team = game.Teams.Lobby                  --//TEAMS on game END


            char.HumanoidRootPart.CFrame = LobbySpawn.CFrame    
        end
    end
end)



local function roundTimer()
    while wait() do
        for i = IntermissionLength, 1, -1 do
            InRound.Value = false
            wait(1)
            Status.Value = ("Intermission: "..i.. " Seconds Left.")
        end
        for i = RoundLength, 1, -1 do
            InRound.Value = true
            wait(1)
            Status.Value = ("Game: ".. i.. " Seconds Left.")

            local playing = {}                      

            for _, player in pairs(game.Players:GetChildren()) do   --//Player Table

                if player.Team.Name == 'Players' then

                    table.insert(playing, player.Name)

                end
            end

            if #playing == 0 then                               --//# of Players Left.
                Status.Value = ' Everyone has died.'
                wait(3)
                break
            elseif #playing == 1 then
                Status.Value = (playing[1].. ' Has Won!')
                wait(3)
                for _, player in pairs(playing) do
                    print(playing)
                    local Winner = playing[1]
                    print(Winner)
                    local PlayerData = Winner.data.Cash.Value
                    print(PlayerData)
                    PlayerData.Cash.Value += 100
                end
                break

            end

        end
    end
end

spawn (roundTimer)