[Rails] Find User by Token

Hi,

I have spent the last couple of hours Googling and trying any thing
that i think will work but i haven't any luck. :(

Here is an outline of what I am trying to do.

I want to show a use there info by going to "http://localhost:3000/
users/5c6e957b523f931fdda3e9922b680c2d868cf44b" (random token)

This is what I have in the routes file and the controller.

# routes

Reg::Application.routes.draw do
resources :users

root :to => "users#new"

match "/users/:token" => "users#show"
end

# controller

def show
@user = User.find(params[:token])
end

At the moment it is giving me this error.

Started GET "/users/5c6e957b523f931fdda3e9922b680c2d868cf44b" for
127.0.0.1 at 2011-01-30 09:54:23 +1100
Processing by UsersController#show as HTML
Parameters: {"id"=>"5c6e957b523f931fdda3e9922b680c2d868cf44b"}
Completed in 10ms

ActiveRecord::RecordNotFound (Couldn't find User without an ID):
app/controllers/users_controller.rb:7:in `show'

This is one of my first rails apps so I don't know exactly what is
causing it - I guess that it will be a simple thing :)

Thanks for you help.

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