Not returning the set boolean?

As I was working on a module script, I found that when I tried calling a "return true" or "return false", it'd either "return nothing" or "return nil". I tried to figure out why it was doing this, but was unable to come to a conclusion.

function api.isPlayer(name)
    local s, m = pcall(function()
        local plr = Players:FindFirstChild(name)
        if plr then
            return true
        else
            return false
        end
    end)
    if s then return else error(m) end
end