I want to add address in a specific Phone Contact

Question

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I have a list of contacts in table view cell whenever I click a cell which is an existing contact I want to add or update address in that existing contact.

var selectedContact: Contact!

Contact! is a model

var updateContact = CNContact()

Code for Updating Contact Address

    func AddMultipleLocations(){
        
        var contact = CNMutableContact()
        contact = selectedAddress.mutableCopy() as! CNMutableContact

// error Value of type Contact has no member mutableCopy

contact.postalAddresses.append(CNLabeledValue(label: CNLabelHome, value: homeAddress)) 
        print(homeAddress)
 do {
     let saveRequest = CNSaveRequest()
     saveRequest.update(contact)
     let contactstore = CNContactStore()
     try contactstore.execute(saveRequest)
self.showToast(message: "Contact Updated ", font: .systemFont(ofSize: 12.0))
} catch let error {
   print(error.localizedDescription)
   self.showToast(message: error.localizedDescription, font: .systemFont(ofSize: 12.0))}