A method for dispensing products from a vending machine includes presenting a start screen of a user interface including menu options associated with a selection of a product. A first interaction associated with the menu options is received and recorded for use in generating an identifier. Additional interactions are received and recorded for use in generating the identifier. Each of the additional interactions corresponds to a selection made a unique sub menu of a plurality of sub menus. The additional interactions are associated with the selection of the product. A last interaction of the additional interactions determines the product to be purchased. An identifier is generated based on the recorded first interaction and the recorded at least one additional interaction. The identifier represents a sequential mapping of the first interaction and the additional interactions. The product and the identifier are provided to a user of the vending machine.