<p>Reserves open slots in a game session for a group of players. New player sessions can be created in any game session with an open slot that is in <code>ACTIVE</code> status and has a player creation policy of <code>ACCEPT_ALL</code>. To add a single player to a game session, use <a href="https://docs.aws.amazon.com/gamelift/latest/apireference/API_CreatePlayerSession.html">CreatePlayerSession</a> </p> <p>To create player sessions, specify a game session ID and a list of player IDs. Optionally, provide a set of player data for each player ID. </p> <p>If successful, a slot is reserved in the game session for each player, and new <code>PlayerSession</code> objects are returned with player session IDs. Each player references their player session ID when sending a connection request to the game session, and the game server can use it to validate the player reservation with the Amazon GameLift service. Player sessions cannot be updated.</p> <p>The maximum number of players per game session is 200. It is not adjustable. </p> <p> <b>Related actions</b> </p> <p> <a href="https://docs.aws.amazon.com/gamelift/latest/developerguide/reference-awssdk.html#reference-awssdk-resources-fleets">All APIs by task</a> </p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}