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:

await new JustTrackSdk.JusttrackSdkBuilder(apiKey)
    .withUserId('new_id')
    .initialize();

await JustTrackSdk.setUserId('new_id'); /* new user ID for some reason */

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