I'm likely being dense but it is unclear to me how to get a bus ticket for the local bus system in Cascais. I've visited the bus station and could not find an obvious ticket kiosk. I cannot seem to procure one from the web site ( https://scotturb.com/en/carreiras/tarifario/pre-comprado/). We do have a green Viva Viagem card we used for the train for Lisbon. Where does on acquire a ticket? Thanks!