func mensaApiKey() -> String { switch self { case .mensa_arcisstr: return "mensa-arcisstr" case .mensa_garching: return "mensa-garching" case .mensa_leopoldstr: return "mensa-leopoldstr" case .mensa_lothstr: return "mensa-lothstr" case .mensa_martinsried: return "mensa-martinsried" cas...