code: def insert_enum_option(self, custom_field, params={}, **options): 
          
          path = "/custom_fields/%s/enum_options/insert" % (custom_field)
          return self.client.post(path, params, **options)
docs: Moves a particular enum option to be either before or after another specified enum option in the custom field.
  
          Parameters
          ----------
          custom_field : {Id} Globally unique identifier for the custom field.
          [data] : {Object} Data for the request
            - enum_option : {Id} The ID of the enum option to relocate.
            - name : {String} The name of the enum option.
            - [color] : {String} The color of the enum option. Defaults to 'none'.
            - [before_enum_option] : {Id} An existing enum option within this custom field before which the new enum option should be inserted. Cannot be provided together with after_enum_option.
            - [after_enum_option] : {Id} An existing enum option within this custom field after which the new enum option should be inserted. Cannot be provided together with before_enum_option.