deleteFirestore

const admin = require("firebase-admin") // required

const projectId = "lingo-e9b0f"
admin.initializeApp({ projectId })

const db = admin.firestore()

async function getMarker() {
  let count = 0;
  const snapshot = await admin.firestore().collection('sentence-pairs').get()
  const less =  snapshot.docs.map(async doc => {
    const sent = {id: doc.id, ...doc.data()}
    if (!sent.tgtLeastFreq) {
      const res = await db.collection('sentence-pairs').doc(sent.id).delete();
    }
  })
}

getMarker()