title: how to get the document id of a document that has a field with a specific value?
body: <p>I would like to get the document id of a document which has a field that has a specific value for example in this collection, i would like to retrieve the document id of the document where the "itemName" is "eggroll.<a href="https://i.stack.imgur.com/tMBnD.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tMBnD.jpg" alt="firestore collection"></a></p>