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Update User Info Data With Singleton Class

  Update User Info Data With Singleton Class               import Foundation         struct UserInfo {         var firstName : String         var lastname : String         }         var objUserInfo : UserInfo?         class Singalton {         static let shared = Singalton()         private init (){}         func getUserInfo () -> UserInfo? {             return objUserInfo         }         func updateInfo ( updatedUsetInfo : UserInfo) -> () {             objUserInfo = updatedUsetInfo         }         }         class user {         func getUser () -> UserInfo?{ ...