# `Apple.Types.GameCenter`
[🔗](https://github.com/cozy-elixir/apple/blob/v0.6.0/lib/apple/types/game_center.ex#L1)

Provides Game Center API related types.

# `achievement_id`

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

An achievement ID.

# `bundle_id`

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

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

# `key_id`

```elixir
@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.

# `leaderboard_id`

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

A leaderboard ID.

# `player_id`

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

A player ID in Game Center.

# `private_key`

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

The private key associated with the `key_id`.

It's in PEM format, like:

```text
-----BEGIN PRIVATE KEY-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
...
-----END PRIVATE KEY-----
```

# `team_id`

```elixir
@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".

---

*Consult [api-reference.md](api-reference.md) for complete listing*