Set a user ID

If your app already assigns a unique ID to each user, you can share this ID with the justtrack SDK. This allows the justtrack backend to associate events received from third parties with the correct user.

If a user’s ID changes, you must provide the new value to the justtrack SDK:

val userId: String = // get your custom user ID from your app

// Use the builder to set a custom user ID
val sdk = JustTrackSdkBuilder(this, API_TOKEN)
    .setUserId(userId)
    // other options...
    .build()

// Or use an existing JustTrackSdk instance to update the custom user ID
sdk.setUserId(userId)

info

The user ID must be shorter than 4096 characters and only consist of printable ASCII characters (U+0020 to U+007E).