How to get the various ids needed for API calls?

I would highly siggest becoming more familiar with programming against Apis before attempting this.  Generally the Ids are coming from another API call such as listing the content items.

Also note things like users, groups, apps, etc the identifiers can be found in the contextual management panel (When on the app, group or user select the upper right pencil and the whichever options is appropraite.  It will be at the bottom).  Note this would not apply to individual threads, posts, etc.  Those you generally list by group or application to get the content and associated Ids

Also note things like users, groups, apps, etc the identifiers can be found in the contextual management panel (When on the app, group or user select the upper right pencil and the whichever options is appropraite.  It will be at the bottom).  Note this would not apply to individual threads, posts, etc.  Those you generally list by group or application to get the content and associated Ids