There is a barrel lock key pick that only a "locksmith" can buy. The pick has "teeths" that will fit the cut of the lock. The pick molds around the lock and then acts like the key. The pick cost around $130-$180 USD. I borrow the pick for personal use, sometimes. It's cheaper to just take a big flathead and slowly pry open the door. The latch should bend enough to open the door. After it is open, just replace to lock.