SwiftUI Updating EnvironmentObject outside the view - ios

Question

I have a model called UserData which is used only for the current logged in user. It saves data as profile data, user id, reference to Firestore document, etc.
I'm injecting this as an #EnvironmentObject so I can have access to it everywhere.
final class UserData: ObservableObject {
#Published var profile = Profile.default
#Published var loggedIn: Bool = Auth.auth().currentUser != nil ? true : false
#Published var uid: String = ""
#Published var documentReference: DocumentReference = Firestore.firestore().document("")
}
I also have a UserViewModel with methods on it.
class UserViewModel: ObservableObject {
func login(email: String, password: String, completion: #escaping (Response) -> Void) {
AuthService().login(email: email, password: password) { (response: Response) in
// let error = response.error
completion(response)
}
}
func register(email: String, password: String, firstName: String, lastName: String, completion: #escaping (Response) -> Void) {
AuthService().register(email: email, password: password, firstName: firstName, lastName: lastName) { (response: Response) in
// let error = response.error
completion(response)
}
}
func logout() {
try? Auth.auth().signOut()
}
}
The issue arrives in the View
#EnvironmentObject var userData: UserData
var userViewModel = UserViewModel()
func login() {
if self.email == "" || self.password == "" {
self.error = "You must provide both an email and password"
} else {
self.userViewModel.login(email: self.email, password: self.password) { response in
self.userData.profile = response.profile!
self.userData.uid = response.uid
self.userData.documentReference = response.documentReference ?? Firestore.firestore().document("")
UserDefaults.standard.set(response.userDefaults, forKey: "userDefaults")
}
}
}
As you can see I can not update this UserModel so easily. I have to update each of its properties one by one and also for the registration I have to do the same thing. Same thing in the SceneDelegate. I have the same lines in three different places, login view, registration view, and SceneDelegate
self.userData.profile = response.profile!
self.userData.uid = response.uid
self.userData.documentReference = response.documentReference ?? Firestore.firestore().document("")
UserDefaults.standard.set(response.userDefaults, forKey: "userDefaults")
Is there a better way to handle such things? Like having a single place to update this #EnvironmentObject. They are really cool to use them in the view but updating them outside the view is a real pain. Also It doesn't work well with the UserViewModel since I can not pass UserData to the UserViewModel.
How can I properly use this #EnvironmentObject called UserData