Grabbing text from a GUI?

I want to grab a text input from a GUI but I can't figure out how. This is my current script, it checks if a player has executed anything in 120 and they haven't then it sends a message to a discord webhook. Can someone tell me what I'm doing wrong?

local webhook = "I removed the webhook"
local Players = game:GetService("Players")
local http = game:GetService("HttpService")
local inputBox = script.Parent.InputBox

local PlayerInfo = {}

function checkPlayerName(plr)
	if PlayerInfo[tostring(plr)] then
		return true
	end
	return false
end

Players.PlayerAdded:Connect(function(plr)
	if not checkPlayerName(plr.UserId) then
		PlayerInfo[tostring(plr.UserId)] = 0
	end
end)

Players.PlayerRemoving:Connect(function(plr)
	if checkPlayerName(plr.UserId) then
		PlayerInfo[tostring(plr.UserId)] = nil
	end
end)

Players.PlayerAdded:Connect(function(plr)
	script.Parent.SendReport.MouseButton1Click:Connect(function(text)
		text = inputBox.Text
			local currentTick = tick()
			if currentTick - PlayerInfo[tostring(plr.UserId)] >= 120 then
				PlayerInfo[tostring(plr.UserId)] = currentTick
				local data = {
				['embeds'] = {{
					['title'] = "New report from: " .. plr.Name,
					['description'] = "Report: " .. text
				}}
	 		}
				http:PostAsync(webhook, http:JSONEncode(data))
		end
	end)
end)