Fix coding standards in application

app/controllers/api/sessions_controller.rb

@@ -1,14 +1,16 @@
-class API::SessionsController < API::ApplicationController
-  skip_before_filter :authenticate!, only: [:create]
+module API
+  class SessionsController < ApplicationController
+    skip_before_filter :authenticate!, only: [:create]
 
-  def create
-    user = User.find_by_email(params[:session][:email])
+    def create
+      user = User.find_by_email(params[:session][:email])
 
-    if !user.try(:authenticate?, params[:session][:password])
-      return render json: '', status: :not_found
+      unless user.try(:authenticate?, params[:session][:password])
+        return render json: '', status: :not_found
+      end
+
+      @user = user
+      self.current_user = @user
     end
-
-    @user = user
-    self.current_user = @user
   end
 end