Trailblazer::WithCurrentUser maps you the current_user in your Trb params hash, this is just a idea and not save for work!

application_controller.rb

class ApplicationController < ActionController::Base
  include Trailblazer::Operation::Controller
  include Trailblazer::WithCurrentUser
  self.trb_with_current_user_param_key = :current_user
  self.trb_with_current_user_method = :current_user
end

with_current_user.rb

module Trailblazer::WithCurrentUser
  [:form, :present, :collection, :run, :respond].each do |method|
    define_method method do |*args, &block|
      options = args.extract_options!
      options[:params][trb_with_current_user_param_key] = send(trb_with_current_user_method)
      args << options
      super *args, &block
    end
  end
end