Rails4.1: AWS errors missing region

Trying to create an image uploader using paperclip , aws-sdk gem and Amazon S3. get error Aws::Errors::MissingRegionError in ProjectsController#create. Missing region; use :region option or export region name to ENV['AWS_REGION']. using Oregon region.

projects_controller.rb

def create
    @project = current_user.projects.new(project_params)
    @project.save
    respond_with(@project)
  end

application.rb file

config.paperclip_defaults = {
        storage: :s3,
            s3_host_name: "s3-us-west-2.amazonaws.com",
        s3_credentials: {
            bucket: ENV['AWS_BUCKET'],
            access_key_id: ENV['AWS_ACCESS_KEY_ID'],
            secret_access_key: ENV['AWS_SECRET_ACCESS_KEY']
        }
    }

according to s3 documentation I understand I need to change to ENV['AWS_REGION']

config.paperclip_defaults = {
        storage: :s3,
            region: "ENV['AWS_REGION"],
        s3_credentials: {
            bucket: ENV['AWS_BUCKET'],
            access_key_id: ENV['AWS_ACCESS_KEY_ID'],
            secret_access_key: ENV['AWS_SECRET_ACCESS_KEY']
        }
    }

and add region to my .env file

export AWS_BUCKET=realv1
export AWS_ACCESS_KEY_ID=AKIAJYYCCCCCC23OA
export AWS_SECRET_ACCESS_KEY=1Y8GMkCCCCCCOJgd0eWxg3pHq4DLUz
export AWS_REGION="'us-west-2'

rebooted server , retested but still getting same errors