Display vote name even when unauthenticated

For example, when sharing the link in messaging apps.

vedia.rb

@@ -317,22 +317,25 @@ post '/votes/new' do
 end
 
 get '/votes/:id' do
-  require_login
   find_vote
   if not @vote
     erb :votes_show_unknown
   else
-    case @vote.state
-    when 'draft'
-      if @vote.users.exists?(current_user.id)
-        erb :votes_edit
-      else
-        erb :votes_show_draft
+    if not current_user
+      erb :votes_show_unauthenticated
+    else
+      case @vote.state
+      when 'draft'
+        if @vote.users.exists?(current_user.id)
+          erb :votes_edit
+        else
+          erb :votes_show_draft
+        end
+      when 'open'
+        erb :votes_show_open
+      when 'closed'
+        erb :votes_show_closed
       end
-    when 'open'
-      erb :votes_show_open
-    when 'closed'
-      erb :votes_show_closed
     end
   end
 end