obdev/app/controllers/admin_controller.rb

class AdminController < ApplicationController
  before_action :authenticate_user!
  load_and_authorize_resource class: User

  def new_user
    @user = User.new
  end

  def create_user
    @user = User.new(user_params)
    if @user.save
      redirect_to some_admin_path, notice: 'User was successfully created.' # Update the redirect path as needed
    else
      render :new_user
    end
  end

  private

  def user_params
    params.require(:user).permit(:email, :password, :password_confirmation)
    # Ensure you permit the right parameters
  end
end