Login Auth Problem in swiftUI in Button Log in Using API [closed] - api

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I tried to log in by using Login Button,
I have created the Model like this in Models.swift,
struct FetchModel: Codable {
var username: String? = ""
var email: String? = ""
var password: String? = ""
}
struct ResModel: Codable {
var status: Int?
var message: String?
var data: DataClass? = nil
var statusType: String?
}
// MARK: - DataClass
struct DataClass: Codable {
var version: Int?
var createdOn, updatedOn: String?
var id: Int
var title, status: String?
var firstName: String?
var middleName: String?
var lastName, email, username: String?
var phone, facebook, linkedin, twitter: String?
var website, company, gender: String?
var agent: String?
var acceptedLicence, logged, locked, twoFAPassed: Bool?
var securityQuestionsActivation, firstLogin, temporaryPasswordChanged: Bool?
var activationHash, forgotPasswordHash: String?
var age: String?
var accessToken: String?
var lockedExpireTime, forgotPasswordHashExpire, acceptedTermsCreationTime, accountDeactivateTime: String?
var accountActivateTime: String?
var createdTime, updatedTime: String?
var roles: [Role]?
var name: String?
}
// MARK: - Role
struct Role: Codable {
var id: Int?
var createdTime, updatedTime, code, name: String?
var permissions: [Permission]?
}
// MARK: - Permission
struct Permission: Codable {
var id: Int?
var createdTime, updatedTime, code, name: String?
var operation, module: String?
var hasRolePermission: Bool?
}
and in the Networking Section I have created in NetworkManager.swift
class Authentication: ObservableObject {
#Published var resModel = ResModel()
#Published var dataClass = DataClass()
#Published var roleModel: [Role] = []
#Published var permissionModel: [Permission] = []
func logInAuth(logIn: FetchModel, completionHandler: #escaping ((ResModel?, Error?)->Void)) {
let encoder = JSONEncoder()
let jsonData = try! encoder.encode(logIn)
var request = URLRequest(url: URL(string: "Here is My api Link")!)
request.httpMethod = HTTPMethod.post.rawValue
request.setValue("application/json; charset=UTF-8", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
AF.request(request).responseData { response in
//print(request.debugDescription)
print(response.debugDescription)
switch response.result {
case .success(let value):
//We decod the main Model class,All data is in ResModel
let response = try? JSONDecoder().decode(ResModel.self, from: value)
self.resModel = response!
self.dataClass = (response?.data)!
for rolemodel in (self.dataClass.roles)! {
self.roleModel.append(rolemodel)
}
print("Login Success")
//print ("Log In response: \(response)")
completionHandler(response, nil)
case .failure(let error):
print("Print Log In\(error)")
completionHandler(nil, error)
}
}
}
}
and in the log-in button
and in the View page I tried to log in by using the login Button, I am a little bit confused about how I can do this authentication in the login button, I created this on the ContentView page on ContentView.swift
#StateObject var auth = Authentication()
#State var fetch = FetchModel()
#State var reqmodel = ResModel()
#State var isGoHome = false
#State private var userName: String = ""
#State private var userPassword = ""
NavigationLink("",destination: Home(),isActive: $isGoHome)
Button(action: {
fetch.username = userName
fetch.password = userPassword
auth.logInAuth(logIn: fetch) { response, error in
print(auth.resModel.message ?? "")
}
isGoHome = true
}, label: {
Text("Login")
.frame(width: 100, height: 50)
.foregroundColor(.white)
.background(Color.blue)
})
But it shows the error
Missing argument for parameter 'from' in call. insert 'From: <#Decoder#>'
How can I take a button for login and I can authenticate it for login using this model and networking class?
After Login this page navigates me to Home() Page. I use ALomofire for this.