What the best way to sell your entire inventory?

I’m planning to temporarily quit from the game (I just need a hard factory reset imo) but I want my inventory to be empty but have a ton of diamonds so when I do come back I don’t have to struggle to farm but in the past trying to sell my entire inventory felt like a pain

Does anyone know the best tips to selling your entire inventory? I wanna avoid trading hub because sitting there removing and adding items slowly is just genuinely boring and I want to sell as quickly as possible