Private Beans - Borderlands 3 Farming Guides
Location: Athenas
Part of: Invasion of Privacy Side Quest
Drops: Front Loader (Shield), Trevonator (Maliwan Shotgun)
In order to fight Private Beans you'll need to be on the Invasion of Privacy Side Quest or have completed it. Speak with Ava sometime after recruiting her on the Sanctuary to pick up this quest, it basically has you return to Athenas and grab a few items she left behind, during which you fight this boss.
You'll find Private Beans on Athenas in the cemetary area (pictured above) in the northeastern most portion of the area. As far as loot goes Front Loader (Shield) and Trevonator (Maliwan Shotgun) are both on Private Bean's dedicated loot list. Both of these items can also be found elsewhere in the game as well as off this named.
Note: The Chupacabratch Target of Opportunity is in the same location as Private Beans and worth doing at the same time.