error message

# After trying to visit /users/hellhuman:

Couldn't find User with id=hellhuman

routes.rb

Asr::Application.routes.draw do
  
  ActiveAdmin.routes(self)
  devise_for :admin_users, ActiveAdmin::Devise.config
  devise_for :users
  resources :pages
  resources :users
  resources :admin
  resources :manage
  
 
  
  match '/manage', :to => 'manage#index'
  match '/update', :to => 'manage#update'
  
  match '/contact', :to => 'pages#contact'
  match '/home', :to => 'pages#home'
  match '/about', :to => 'pages#about'
  match '/league', :to => 'pages#league'
  match '/results', :to => 'pages#results'
  match '/prizes', :to => 'pages#prizes'
  match '/news', :to => 'pages#news'
  match '/users', :to => 'users#index'

  match '/:kgs_names', :to => 'users#show'
  
  root :to => "pages#home"
end

show.html.erb

<%= @user.username %>, <%= @user.email %>

<% if user_signed_in? %>
	<p>Welcome!</p>
	<table>
		<tr>
			<th>Black Player</th>
			<th>White Player</th>
			<th>Result</th>
		</tr>
	<% @games.each do |game| %>
		<tr>
			<td><%= game.black_player_name %></td>
			<td><%= game.white_player_name %></td>
			<td><%= game.result %></td>
		</tr>
	<% end %>
	</table>
	
<% else %>
	<p>You're not signed in!</p>
<% end %>

users_controller.rb

  def show
    @user = User.find(params[:id])
    @games = Match.where("white_player_name = ? or black_player_name = ?", @user.kgs_names, @user.kgs_names)
  end