Player joins a game session

curl --request POST \
  --url https://api.readmin.app/activity/playerJoin \
  --header 'Content-Type: application/json' \
  --header 'loader-id: <api-key>' \
  --data '{
  "playerId": 123,
  "platform": "Phone",
  "safechat": true,
  "username": "<string>",
  "tzOffset": "<string>"
}'

{
  "success": true,
  "banned": true,
  "reason": "<string>",
  "isStaff": true,
  "sessionId": "<string>",
  "runningPlayerId": "<string>"
}