I am working on an app using coreData and a log in. For that, I have a LoginView and LoginViewModel that I use to get the info to the ContentView. I keep getting this error message: “Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[abcText2Speech.UserEntity firstname]: unrecognized selector sent to instance 0x6000017f14c0′”

With this callstack:
*** First throw call stack: ( 0 CoreFoundation 0x00007ff80049b761 __exceptionPreprocess + 242 1 libobjc.A.dylib 0x00007ff800063904 objc_exception_throw + 48 2 CoreFoundation 0x00007ff8004b0873 +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0 3 CoreFoundation 0x00007ff80049fef4 ___forwarding___ + 1459 4 CoreFoundation 0x00007ff8004a20f8 _CF_forwarding_prep_0 + 120 5 abcText2Speech 0x000000010b5dd5ce $s14abcText2Speech11ContentViewV4bodyQrvg7SwiftUI05TupleE0VyAE6SpacerV_AE4TextVAE0E0PAEE5frame5width6height9alignmentQr12CoreGraphics7CGFloatVSg_AuE9AlignmentVtFQOyAmEE15foregroundColoryQrAE0U0VS 6 abcText2Speech 0x000000010b5e867d $s14abcText2Speech11ContentViewV4bodyQrvg7SwiftUI05TupleE0VyAE6SpacerV_AE4TextVAE0E0PAEE5frame5width6height9alignmentQr12CoreGraphics7CGFloatVSg_AuE9AlignmentVtFQOyAmEE15foregroundColoryQrAE0U0VS 7 SwiftUI 0x00007ff84a238bd1 block_destroy_helper.34 + 287 8 abcText2Speech 0x000000010b5dced7 $s14abcText2Speech11ContentViewV4bodyQrvg + 775 9 abcText2Speech 0x000000010b5e6fb7 $s14abcText2Speech11ContentViewV7SwiftUI0E0AadEP4body4BodyQzvgTW + 55 10 SwiftUI 0x00007ff84a400092 __swift_destroy_boxed_opaque_existential_0Tm + 1400748 11 SwiftUI 0x00007ff84b293585 objectdestroy.15Tm + 35474 12 SwiftUI 0x00007ff84b2932ba objectdestroy.15Tm + 34759 13 SwiftUI 0x00007ff84ad275d0 __swift_allocate_boxed_opaque_existential_1Tm + 209 14 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 15 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 16 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 17 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 18 SwiftUI 0x00007ff84b293244 objectdestroy.15Tm + 34641 19 SwiftUI 0x00007ff84ad275d0 __swift_allocate_boxed_opaque_existential_1Tm + 209 20 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 21 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 22 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 23 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 24 SwiftUI 0x00007ff84aae3cb9 __swift_allocate_boxed_opaque_existential_1Tm + 547472 25 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 26 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 27 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 28 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 29 SwiftUI 0x00007ff84a05a9a4 keypath_getTm + 3166475 30 SwiftUI 0x00007ff84a0e408a objectdestroy.843Tm + 27632 31 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 32 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 33 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 34 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 35 SwiftUI 0x00007ff84aae3bdb __swift_allocate_boxed_opaque_existential_1Tm + 547250 36 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 37 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 38 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 39 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 40 SwiftUI 0x00007ff84b292ad7 objectdestroy.15Tm + 32740 41 SwiftUI 0x00007ff84b292e2d objectdestroy.15Tm + 33594 42 SwiftUI 0x00007ff84b292bfe objectdestroy.15Tm + 33035 43 SwiftUI 0x00007ff84ad275d0 __swift_allocate_boxed_opaque_existential_1Tm + 209 44 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 45 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 46 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 47 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 48 SwiftUI 0x00007ff84b292ad7 objectdestroy.15Tm + 32740 49 SwiftUI 0x00007ff84b292e2d objectdestroy.15Tm + 33594 50 SwiftUI 0x00007ff84b292bfe objectdestroy.15Tm + 33035 51 SwiftUI 0x00007ff84ad275d0 __swift_allocate_boxed_opaque_existential_1Tm + 209 52 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 53 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 54 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 55 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 56 SwiftUI 0x00007ff84b292ad7 objectdestroy.15Tm + 32740 57 SwiftUI 0x00007ff84b292e2d objectdestroy.15Tm + 33594 58 SwiftUI 0x00007ff84b292bfe objectdestroy.15Tm + 33035 59 SwiftUI 0x00007ff84ad275d0 __swift_allocate_boxed_opaque_existential_1Tm + 209 60 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 61 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 62 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 63 AttributeGraph 0x00007ff838ce28a6 AGGraphGetValue + 233 64 SwiftUI 0x00007ff84b292ad7 objectdestroy.15Tm + 32740 65 SwiftUI 0x00007ff84b292e2d objectdestroy.15Tm + 33594 66 SwiftUI 0x00007ff84b292bfe objectdestroy.15Tm + 33035 67 SwiftUI 0x00007ff84ad275d0 __swift_allocate_boxed_opaque_existential_1Tm + 209 68 AttributeGraph 0x00007ff838cc1e8b _ZN2AG5Graph11UpdateStack6updateEv + 601 69 AttributeGraph 0x00007ff838cc266e _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 446 70 AttributeGraph 0x00007ff838cca39a _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 638 71 A"

Here is my code where I think the issue lies :

this is from LoginViewModel:

` func signup()-> (UserEntity, Int){
@StateObject var dataController = DataController.shared

    buttonState = .loading(title: "Loading", systemImage: "person")
    
    DispatchQueue.main.asyncAfter(deadline: .now()+1.5){
        if self.isValidEmail() && self.isValidPassword() && self.isValidName(){
            self.isLoggedIn = true
            dataController.addUser(firstname: self.fname, lastname: self.lname, email: self.email, password: self.password)
            
            print("signed in")
            print(dataController.savedEntities[(dataController.savedEntities.count)-1].email ?? "email")
            print(self.isLoggedIn)
            self.buttonState = .enabled(title: "Login", systemImage: "checkmark.circle")
        } else{
            self.buttonState = .disabled(title: "Fill out all fields to log in", systemImage: "exclamationmark.circle")
        }
    }
    print("Test")
    print(dataController.savedEntities[(dataController.savedEntities.count)-1].email ?? "email")
        
    return (dataController.savedEntities[(dataController.savedEntities.count)-1], 1)

}`

and this all prints with no issue.

this is the relevant part of sign up view

` ActionButton(state: $model.buttonState, onTap:{
signup = model.signup()
user = signup.0

                    }, backgroundColor: .primary , foregroundColor: Color(UIColor.systemBackground)
                    )
                    NavigationLink (destination: LoginView()){
                        Text("Already have a profile? Click here to Log in")
                    }
                }
            } label: {
                Label("Welcome!", systemImage: "hand.wave")
            }
            .padding()
            .textFieldStyle(.plain)
            let keyboard = abcTextViewModel()
            
            NavigationLink (destination: ContentView(viewModel: keyboard, currentUser: user) , isActive: $model.isLoggedIn){
                
                EmptyView()
            }`

and this is the part of Content view that breaks it

Text(currentUser.firstname ?? "name")
these are the details of UserEntity

and this is the DataController code

`
import Foundation
import CoreData

class DataController: ObservableObject{
static let shared = DataController()

let container: NSPersistentContainer
@Published var savedEntities: [UserEntity] = []

init(){
    container = NSPersistentContainer(name: "Model")
    container.loadPersistentStores { description, error in
        if let error = error {
            print("Core Data failed to load: (error.localizedDescription)")
        }
    }
    fetchUsers()
}

func fetchUsers() {
    let request = NSFetchRequest<UserEntity>(entityName: "UserEntity")
    
    do {
        savedEntities = try container.viewContext.fetch(request)
    } catch let error {
        print("Error while fetching: (error)")
    }
}

func addUser(firstname: String, lastname: String, email: String, password: String) {
    let newUser = UserEntity(context: container.viewContext)
    newUser.firstname = firstname
    newUser.lastname = lastname
    newUser.email = email
    newUser.id = password
    saveData()
}

func saveData(){
    do {
        try container.viewContext.save()
        fetchUsers()
    } catch let error {
        print("Error saving: (error)")
    }
} }`

any help would be greatly appreciated, I have been stuck on this one error for quite a while

I tried printing the user details in login view model which worked, however that did not carry over to content view.