The main parameters for the `udmanager` shortcode are as follows:
slug: The slug of the plugin that you wish to show information for. This needs to match what you have set in the general plugin configuration (which in turn, should match the plugin’s directory name).
userid: The WordPress user ID that the plugin belongs to; i.e. the user ID of the account that you have set the plugin up in in the plugins manager.
showaddons: If your plugin is set up in the plugins manager to use the ‘add-ons’ mode, and you want to show per-add-on information, then set this to true.
showunpurchased: If set to “true”, then show information even if there are no purchases for the indicate plugin/add-ons.