README.md in grape-batch-1.1.3 vs README.md in grape-batch-1.1.4

@@ -45,10 +45,13 @@
 ```ruby
 Grape::Batch.configure do |config|
   config.limit = 10
   config.path = '/batch'
   config.formatter = Grape::Batch::Response
+  config.logger = nil
+  config.session_header = 'HTTP_X_SESSION_TOKEN'
+  config.session_proc = Proc.new {}
 end
 ```
 
 | Argument | Type | Default | Description
 | :---: | :---: | :---: | :---:
@@ -94,9 +97,31 @@
     ]
 }
 ```
 
 'body' is optional.
+
+### Sessions
+It's possible ensure a single session during the execution of the batch. You have to specify your session/token/auth header and your session Proc. Before running the batch, the Proc is executed with the data extracted from the specified session header and stored in rack env 'api.session' key.
+```ruby
+# Example
+# Considering the config
+Grape::Batch.configure do |config|
+  config.session_header = 'HTTP_X_SESSION_TOKEN'
+  config.session_proc = Proc.new {|token| User.where(token: token).first }
+end
+
+# You can build a Grape helper like this
+module AuthHelpers
+  def current_user
+    if env['api.session']
+      env['api.session']
+    else
+      # do authentication stuff
+    end
+  end
+end
+```
 
 ## Contributing
 
 1. Fork it ( https://github.com/c4mprod/grape-batch/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)