Firebase Settings

Go to https://console.firebase.google.com/ and new project

Create ios app with bundle id and download GoogleService-Info.plist and drag drop in your project.

Open the Real Database left sidebar and import the json file /project_ios/visitapp-db.json

And set read write settings

{
  /* Visit https://firebase.google.com/docs/database/security to learn more about security rules. */
  "rules": {
    ".read": true,
    ".write": true
  }
}