@type achievement_id() :: String.t()

An achievement ID.

@type bundle_id() :: String.t()

The app's bundle ID, like "com.example.game".

@type key_id() :: String.t()

The private key ID for Game Center API, like "2Y9R5HMY68".

To obtain the private key ID, sign into Apple Developer and complete the following steps:

1. Navigate to "Certificates, IDs & Profiles".
2. Navigate to "Keys".
3. Generate a new key with Game Center enabled.
4. Download the private key.

@type leaderboard_id() :: String.t()

A leaderboard ID.

@type player_id() :: String.t()

A player ID in Game Center.

@type private_key() :: String.t()

The private key associated with the key_id.

It's in PEM format, like:

-----BEGIN PRIVATE KEY-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
...
-----END PRIVATE KEY-----

@type team_id() :: String.t()

The issuer ID (Team ID), which is a 10-character string, like "6MPDV0UYYX"

To obtain the team ID, sign into Apple Developer and complete the following steps:

1. Navigate to "Membership details".