How to use .getResponse in react typescript?

Can't see in documentation how to validate .getResponse. And when I tried .getResponse() is not a function

```
const submitContactForm: any = async (e: MouseEvent) => {
e.preventDefault()
const recaptchaValue = recaptchaRef.current.getValue()

console.log(recaptchaValue.getResponse())

if (!recaptchaValue) {
setRecaptchaError(true)
}
}
```

In other libraries they have .getResponse why it is not available here?