Set default text in a text box

[Walkerbo]

Hi all

I have a frame that can be scaled via a text box.
When I reload I need the text box to be filled with the saved scale.

The frame does correctly scale based on the saved scale on reload however I have not been able to fill the text box with the saved scale value on login.

I get no errors and even when I try to hard-set a number in the text box it remains empty.

Here is my table of variables;

local NewbDevBoxOptionsTable = {
    ButtonFrameScale = 1,
    ButtonFrameOpacity = 1,
    ButtonIsVisable = true
}

My update frame scale;

local function updateButtonFrameScale(updateScaleNumber)
    if updateScaleNumber >= 301 then -- if the entered number is too high
        updateScaleNumber = 300
    elseif updateScaleNumber <= 49 then -- if the entered number is too low
        updateScaleNumber = 50
    end
    NewbDevBoxOptionsTable.ButtonFrameScale = updateScaleNumber / 100
    NewbDevBoxButtonFrame:SetScale(NewbDevBoxOptionsTable.ButtonFrameScale)
    NewbDevBoxInterfaceFrame.ScaleTextBox:SetNumber(updateScaleNumber)
end

and setting the frame scale on player login

if event == "PLAYER_LOGIN" then
NewbDevBoxButtonFrame:SetScale(NewbDevBoxOptionsTable.ButtonFrameScale)
NewbDevBoxInterfaceFrame.ScaleTextBox:SetNumber(NewbDevBoxOptionsTable.ButtonFrameScale * 100)

and here is my textbox setup

NewbDevBoxInterfaceFrame.ScaleTextBox =
    CreateFrame("EditBox", "NewbDevBoxInterfaceFrameScaleTextBox", NewbDevBoxInterfaceFrame, "OptionsBoxTemplate")
NewbDevBoxInterfaceFrame.ScaleTextBox:SetPoint(
    "TOPLEFT",
    NewbDevBoxInterfaceFrameKeybindsButton,
    "BOTTOMLEFT",
    0,
    NumberList.textBoxYGap
)
NewbDevBoxInterfaceFrame.ScaleTextBox:SetFontObject(TextDimensionList.checkBoxFont)
NewbDevBoxInterfaceFrame.ScaleTextBox:SetNumeric(true)
NewbDevBoxInterfaceFrame.ScaleTextBox:SetSize(NumberList.scaleTextBoxWidth, NumberList.scaleTextBoxHeight)
NewbDevBoxInterfaceFrame.ScaleTextBox:SetMaxLetters(3)
NewbDevBoxInterfaceFrame.ScaleTextBox:SetAutoFocus()
NewbDevBoxInterfaceFrame.ScaleTextBox:SetJustifyH("CENTER")
NewbDevBoxInterfaceFrame.ScaleTextBox:SetScript(
    "OnEnterPressed",
    function(self)
        scaleNumber = tonumber(NewbDevBoxInterfaceFrame.ScaleTextBox:GetText())
        self:ClearFocus()
        updateButtonFrameScale(scaleNumber)
    end
)

I have not been able to work out why this is not working correctly, it is probably staring me in the face yet I cannot see where I have stuffed up.