How do I make this variable work correctly? Putting a number manually works.

Hello. I have been trying to make a script clear your accessories and then load in your current roblox avatar accessories.

local player = game.Players:FindFirstChild(username)
local playeruserid = player.UserId
print(playeruserid)
print(type(playeruserid))

clearAccessories(character) -- This is working like it should. Don't mind the "character" variable.
wait(0.5)           
character.Humanoid:ApplyDescription(game.Players:GetHumanoidDescriptionFromUserId(playeruserid))

The issue is the last line of the code not running correctly. If I replace the "playeruserid" variable with a userid manually, such as "1081709372" the script works fine. I can't figure out why, because using the two prints I can see that I get a correct userid in the variable and it is of the number type.

It should be the same as if I put it in manually, considering it's an ID in the number type? I did try running the tonumber function prior to putting it in without success.