How to use the react-native-contacts.getContactsMatchingString function in react-native-contacts

search(text) {
    const phoneNumberRegex = /\b[\+]?[(]?[0-9]{2,6}[)]?[-\s\.]?[-\s\/\.0-9]{3,15}\b/m;
    const emailAddressRegex = /^(([^<>()[\].,;:\s@"]+(\.[^<>()[\].,;:\s@"]+)*)|(".+"))@(([^<>()[\].,;:\s@"]+\.)+[^<>()[\].,;:\s@"]{2,})$/i;
    if (text === "" || text === null) {
      this.loadContacts();
    } else if (phoneNumberRegex.test(text)) {
      Contacts.getContactsByPhoneNumber(text, (err, contacts) => {
        this.setState({ contacts });
      });
    } else if (emailAddressRegex.test(text)) {
      Contacts.getContactsByEmailAddress(text, (err, contacts) => {
        this.setState({ contacts });
      });
    } else {
      Contacts.getContactsMatchingString(text, (err, contacts) => {
        this.setState({ contacts });
      });
    }
  }

return new Promise((resolve, reject) => {
    Contacts.getContactsMatchingString(searchString, (err, contacts) => {
      if (err) {
        reject(err)
        return
      }
      resolve(contacts)
    })
  })
}