How do I make a player always move forward?

As the title says, I'm trying to make it so that you always move forward but can move left and right too. Here is what I have so far:

local RunService = game:GetService("RunService")
local Players = game:GetService("Players")

local player = Players.LocalPlayer

wait()
RunService:BindToRenderStep("move", Enum.RenderPriority.Character.Value + 1, function()
    if player.Character then
        local humanoid = player.Character:FindFirstChild("Humanoid")
        if humanoid then
            humanoid:Move(Vector3.new(0, 0, -1), true)
        end
    end
end)

That makes the player move forward forever but doesn't let the player move left or right. Which I want them to be able to move left and right while doing so.