How to validate condition in render return using react native?

In my scenario, I am trying to create a validation logic within render return. I have asycstorage value I am getting value and validate by using below code

render() {    const value = AsyncStorage.getItem(‘username’);  return ({value !== null &&        (<View……………..</View> )})}

Above code not validating also based on validation result it is not rendering. If value not equal to null mean, I need to render view. How to achieve this?