implemented TPIN and quick pay within bank

lib/data/models/transaction.dart

@@ -2,7 +2,7 @@ class Transaction {
   final String? id;
   final String? name;
   final String? date;
-  final int? amount;
+  final String? amount;
   final String? type;
 
   Transaction({this.id, this.name, this.date, this.amount, this.type});
@@ -21,7 +21,7 @@ class Transaction {
       id: json['id'] as String?,
       name: json['name'] as String?,
       date: json['date'] as String?,
-      amount: json['amount'] as int?,
+      amount: json['amount'] as String?,
       type: json['type'] as String?,
     );
   }