Hey! Is there any opportunity in SwiftUI to keep a global variable that can changed its value and not cause views refresh (because I'm not going to display the value of this var)?

Hi! I'm learning SwiftUI and now got stuck with a problem of using @EnvironmentObject. The problem is: I get an email inputed by user and I have to pass it through several view (each view I call with NavigationLink). But I get an error sometimes: struct RepeatPinView: View {   @State var pin: String   @State var pinRepeat: String = ""   @State var text: String = "Repeat PIN"   @State var selection: String? = nil       @EnvironmentObject var globalObj: GlobalObj   @Environment(\.colorScheme) var colorScheme       var body: some View {           let buttons: [[numPadButton]] = [       [.one, .two, .three],       [.four, .five, .six],       [.seven, .eight, .nine],       [.dop, .zero, .del],     ]           VStack {       NavigationLink(destination: ContentView(), tag: "GotPin", selection: $selection) { EmptyView() }       Spacer() //      Text("Pin repeat \(globalObj.email)") /* here I'm trying to check the email but sometimes and sometimes not (whaat.. can't understand how it works) I get a Fatal error: No ObservableObject of type GlobalObj found */       Text(text)         .font(.system(size: 30))       Spacer()       Text(pinRepeat)         .font(.system(size: 30))         .onChange(of: pinRepeat) { pinRepeat in           print(pinRepeat) //          print(globalObj.email) /* same problem, sometimes get a Fatal error*/           if pinRepeat.count == 4 {             if self.pinRepeat == pin {               print(globalObj.email)               let textToWrite = globalObj.email + "\n" + pinRepeat print(textToWrite) /* surprisingly, but here everything works fine WHY??? */               selection = "GotPin"             } else {               text = "Try again"             }           }         }         .frame(width: 100, height: 50, alignment: .center)       Spacer()       ForEach(buttons, id: \.self) { row in         HStack {           ForEach(row, id: \.self) { item in             Button(action: {               switch item.rawValue {               case "dop":                 print("dop")               case "del":                 print("del")                 if pinRepeat != "" {                   pinRepeat.removeLast()                 }               default:                 pinRepeat.append(item.rawValue)               }             }, label: {               if item.rawValue == "del" {                 Image(systemName: "delete.left")                   .font(.title)                   .foregroundColor(colorScheme == .dark ? .white : .black)                   .padding()               } else if item.rawValue == "dop" {                 Text("")                   .font(.title)                   .foregroundColor(colorScheme == .dark ? .white : .black)                   .padding()               } else {                 Text(item.rawValue)                   .fontWeight(.bold)                   .font(.largeTitle)                   .foregroundColor(colorScheme == .dark ? .white : .black)                   .padding()                   .background(                     Circle()                       .stroke(Color.yellow, lineWidth: 4)                       .frame(width: buttonWidth(item: item) - 5, height: buttonHeight(item: item) - 5, alignment: .center)                   )               }             })             .frame(width: buttonWidth(item: item), height: buttonHeight(item: item), alignment: .center)             .padding([.trailing, .leading], 7)                         }         }         .padding(.bottom, 7)       }       Spacer()       Spacer()       Spacer()     }   } } In previous views (there are three views before this one) I never got a Fatal error doing the same things. Help me, please