So I have a webhook script and everything is working perfectly. The only problem is, when I try making a value equal a text, it prints the text's value before it is changed. I tried using a FocusLost function and a GetPropertyChangedSignal and it I get the HTTP 400 Bad Request error. How could I make it detect when the text is changed?

local data = HttpService:JSONEncode({
		['username'] = 'Training Initiated',
			['embeds'] = {{
				title = "**" .. player.Name .. " has initiated a training!**",
				description = "[A training is taking place on Novira Resurge Recruitment Center](https://www.roblox.com/games/3614503911/Noviran-Resurge-Recruitment-Centre).",
				color = 16711680,
				thumbnail = {
					url = "https://cdn.discordapp.com/attachments/548348433803640834/618639311578857492/ForTragic.png"
				},
				fields = {
					{
						name = 'Host:',
						value = player.Name,
						inline = true
					},
					{
						name = 'Co-Host',
						value = player.PlayerGui.CreateTrainingGui.CoHost:GetPropertyChangedSignal("Text"),
						inline = true
					},
					{
						name = 'Type of Event:',
						value = "N/A",
						inline = true
					},		
					{
						name = 'Rank(s):',
						value = "N/A",
						inline = true
					}
				},
				footer = {
					text = "{volgrok100 Training System}"
				},
			}},
		["content"] = "@everyone " .. "**" .. player.Name .. "**" .. " is hosting a training!"
	})
               
	HttpService:PostAsync(URL, data)
Anonymous