What is wrong with the Discord Webhook?

Because I want the text input from a text box to send to discord But that has to be set to description, right?

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local remotes = ReplicatedStorage.Remotes

remotes.DiscordSend.OnServerEvent:Connect(function()
    local textboxinput = script.Parent.Parent.StarterGui.ScreenGui.Frame.TextBox.Text
    local http = game:GetService("HttpService")
    local url = ""

    local data = {
            ['embeds'] = {{
                ['title'] = "**PRIVATE FLIGHT BOOKING**",
                ['description'] = textboxinput,
                ['color'] = 16095761,
            
            }}
    
    }
    
    local finaldata = http:JSONEncode(data)
    http:PostAsync(url,finaldata)

end)

You will need a remote event if your accessing something from the server but if not you don't need it.also use playegui rather than startergui because if you don't it will cause issues such as if won't work until the player has respawned. Try this it should work.

local http = game:GetService("HttpService")

game:GetService("Players").PlayerAdded:Connect(function(player)
	if not game:GetService("RunService"):IsStudio() then
		local date = os.date("!*t")
		local Data = {
			["content"] = player.Name.." joined your game on "..date.month.."/"..date.day.."/"..date.year
		}
		Data = http:JSONEncode(Data)
		http:PostAsync("[Discord hook here]", Data)
	end
end)