generates a guid and stores it in the async store
npm install react-native-unique-idgenerates a guid and stores it in the async store
This is supposed to identify the device / user.
It creates a guid if no exists and stores it in the AsyncStorage.
If a Guid exists, this will be returned
    
``bash`
npm install react-native-unique-id --save
`js
const uniqueId = require("react-native-unique-id");
uniqueId()
.then(id => console.log(id))
.catch(error => console.error(error));
// or callback style
uniqueId((error, id) => {
if (error) return console.error(error);
console.log(id);
});
``
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