sortExpression
Instructions on how to sort the search results. If no sort expression is included, the request returns results in random order. A sort expression consists of the following elements:
Operand -- Name of a game session attribute. Valid values are
gameSessionName,gameSessionId,gameSessionProperties,maximumSessions,creationTimeMillis,playerSessionCount,hasAvailablePlayerSessions.Order -- Valid sort orders are
ASC(ascending) andDESC(descending).
For example, this sort expression returns the oldest active sessions first: "SortExpression": "creationTimeMillis ASC". Results with a null value for the sort operand are returned at the end of the list.