Does anyone know how I could use game.Players.LocalPlayer and httprequests?

Alright, so I've been having problems all day with my script and I don't know how to fix it. So I'm making a Gui through scripts so it can be used in script builder, I have a whitelist in the script that uses GetAsync on a pastebin link, that pastebin link contains a UserId, it checks if the UserId matches the LocalPlayers UserId, if it does, then the authorization is done, but the thing is, If I run the script through localscript, it wont work because httprequests are done with global scripts, but if I run it through a global script, then game.Players.LocalPlayer wouldn't work, and I don't know how to fix this.

Source:

Gui = Instance.new("ScreenGui",game.Players.LocalPlayer.PlayerGui) -- << help needed here
Frame = Instance.new("Frame",Gui)
Name = Instance.new("TextLabel",Frame)
Auth = Instance.new("Frame",Gui)
Name2 = Instance.new("TextLabel",Auth)
AuthSign = Instance.new("TextLabel",Auth)


Auth.BackgroundColor3 = Color3.new(0,0,0)
Auth.BackgroundTransparency = 0.6
Auth.Position = UDim2.new(0,850,0,450)
Auth.Size = UDim2.new(0,500,0,300)
Auth.Draggable = true
Auth.Active = true


AuthSign.Size = UDim2.new(0,500,0,50)
AuthSign.Position = UDim2.new(0,0,0,100)
AuthSign.BackgroundColor3 = Color3.new(0,0,0)
AuthSign.BackgroundTransparency = 1
AuthSign.Font = "SourceSansLight"
AuthSign.FontSize = "Size36"
AuthSign.Text = "Authorizing..."
AuthSign.TextColor3 = Color3.new(255,255,255)


Frame.BackgroundColor3 = Color3.new(0,0,0)
Frame.BackgroundTransparency = 0.6
Frame.Position = UDim2.new(0,850,0,450)
Frame.Size = UDim2.new(0,450,0,300)
Frame.Draggable = true
Frame.Active = true
Frame.Visible = false


Name.Size = UDim2.new(0,450,0,50)
Name.BackgroundColor3 = Color3.new(0,0,0)
Name.BackgroundTransparency = 0.6
Name.Font = "SourceSansLight"
Name.FontSize = "Size36"
Name.Text = "Awsomeman511's Gui"
Name.TextColor3 = Color3.new(255,255,255)


Name2.Size = UDim2.new(0,500,0,50)
Name2.BackgroundColor3 = Color3.new(0,0,0)
Name2.BackgroundTransparency = 0.6
Name2.Font = "SourceSansLight"
Name2.FontSize = "Size36"
Name2.Text = "Awsomeman511's Gui"
Name2.TextColor3 = Color3.new(255,255,255)









HS = game:GetService("HttpService") -- << help needed here
scriptGrab = HS:GetAsync("http://pastebin.com/raw/tJZRWNaP", true)
if tonumber(string.sub(scriptGrab,1,8)) or tonumber(string.sub(scriptGrab,11)) == game:GetService("Players").LocalPlayer.UserId then
    print("its good")
end