How to assign give value to an array entity in interface in angular?

Question

This i how I am calling a patch api in angular using an interface named Create

1> This is my apiService.ts code

const postData : Create = {
 "address": {
     "city": "string",
     "addressDetails": "string",
     "pincode": "string",
     "state": "string",
     "country": "string"
   },
     "bankName": "string",
     "branch": "string",

}

2> This is my Component.ts code

 getPatchBankAPI(postData : Create , postForm : NgForm){
    this.patchService.getPatchBank(
    
     
      postData.bankName,
      postData.branch,
      postData.address,
      
      )

3> This is my HTML code

<div class="col-md-6">
                    
                    <div class="form-row">
                        <div class="value">
                            <div class="input-group">
                                <input class="input--style-5" type="text"  class="form-control"
                                id="bankName"
                                required
                                ngModel
                                name="bankName" placeholder="Bank Name">
                                
                            </div>
                        </div>
                    </div></div> 
                <div class="col-md-6">
                    
                    <div class="form-row">
                        <div class="value">
                            <div class="input-group">
                                <input class="input--style-5" type="text"  class="form-control"
                                id="branch"
                                required
                                ngModel
                                name="branch" placeholder="Bank Branch">
                                
                            </div>
                        </div>
                    </div></div> 
                  <div class="col-md-6">
                <div class="form-row">
                    <div class="value">
                        <div class="input-group">
                            <input class="input--style-5" type="text"  class="form-control"
                            id="  city  "
                            required
                            ngModel
                            name="  city  "  placeholder="Bank Address">
                            </div>
                    </div>
                </div></div>

Now my problem is that If I want to take city name as an input then what should I write in : id=" " required ngModel name=" " id required ng model and name ?? Like address.city or directly city , I have tried directly writing city but my api is not accepting it