I need some help. I'm looking to pull some specific data from the WoW API, but I'm a complete noob. Essentially, I want to take a look at all of the members of a guild and identify which achievements they are missing. The purpose of this would be to identify potential areas for scheduled small group content/events.
For the experts out there: is targeting this specific set of information possible? If so, can you point me to a WoW API 101 crash course and any other tools I might need explore more?