I’d like to make a WordPress user that only has the ability to compose and send newsletters. I don’t want the user to have access to other plugins, settings, etc like the generic editor role, and I don’t believe authors or contributors can access the plugins like Newsletter at all. I downloaded the Members plug-in so I can set up a new user role with custom permissions. What values do I enter in the custom capability to grant access to Newsletter composing/sending? (Eg. other plugin permissions that pop up include et_support_center, rocket_purge_posts, video_gallery_edit_player_configs, etc.)