make longer devise timeout

config/initializers/devise.rb

@@ -80,7 +80,7 @@ Devise.setup do |config|
   # The time you want to timeout the user session without activity. After this
   # time the user will be asked for credentials again.
   # config.timeout_in = 10.minutes
-  config.timeout_in = 10.minutes
+  config.timeout_in = 5.days
 
   # ==> Configuration for :lockable
   # Defines which strategy will be used to lock an account.