Can't fetch data through the key (Firestore)

Question

I can't fetch the data through Firestore key.

TypeError: relativePath.split is not a function

export const itemsFetch = () => {
  return (dispatch) => {
  firebase.firestore().collection('users').doc(19910929).get()
      .then((snapshot) => {
        console.log('snapshot:', snapshot);
      })
  };
};

Answer 1

I have updated data to that with string.

19910929 to '19910929'

That would work!