---
title: applicationUsername
framework: storekit
role: symbol
role_heading: Instance Property
path: storekit/skpayment/applicationusername
---

# applicationUsername

A string that associates the transaction with a user account on your service.

## Declaration

```swift
var applicationUsername: String? { get }
```

## Discussion

Discussion For more information on how to set and use this property, see applicationUsername.

## See Also

### Getting Payment Details

- [productIdentifier](storekit/skpayment/productidentifier.md)
- [quantity](storekit/skpayment/quantity.md)
- [requestData](storekit/skpayment/requestdata.md)