Ionic v4 Contacts Fields Null

[karayilanx]

Hi here is my code when try reach contacts list all fields return null

    this.contacts.find(["*"])
    .then((data: Contact[]) => {
      this.allContacts = data
      data.forEach(element => {
        this.kisiler.push(element.displayName);
      });
    }).finally(() => {
      console.log(this.allContacts);
    });
  }