Chef LWRP calling issue

Question

I am creating LWRP for a cookbook azuretrafficmanager, steps are following

• Created Resource: traffic_manager.rb

  actions :create   
  default_action :create    
  
  attribute :resource_group_name
  attribute :profile_name
  attribute :subscription
  attribute :traffic_manager
  attribute :azure_token
  

• Created Provider: traffic_manager.rb

  def whyrun_supported?
     true
  end
  
  action :create do
    converge_by("Creating.") do
      traffic_manager_processor = TrafficManagers.new(@new_resource.resource_group_name,
                                                 @new_resource.profile_name,
                                                 @new_resource.subscription,
                                                 @new_resource.traffic_manager,
                                                 @new_resource.azure_token)
      traffic_manager_processor.create_update_profile
    end # Move on next line, copy/paste error or root cause ?
  
    @new_resource.updated_by_last_action(true) 
  end
  

• And then I am calling this in my recipe

  azuretrafficmanager_traffic_manager 'createtrafficmanager' do
    resource_group_name resource_group_name
    profile_name profile_name
    subscription subscription
    traffic_manager traffic_manager
    azure_token azure_token
    action :create
  end
  

• The above method of calling lwrp isn't working, but when i try the second method which is:

  azuretrafficmanager_traffic_manager 'createtrafficmanager' do
    resource_group_name resource_group_name
    profile_name profile_name
    subscription subscription
    traffic_manager traffic_manager
    azure_token azure_token
    action :nothing
  end.run_action(:create)
  

• By following this method(run_action) of calling lwrp, it is working perfectly.

The problem is, why the first syntax of calling lwrps isn't working?