|obj||The object to spawn.|
|player||The player object to set Client Authority to.|
|assetId||The assetId of the object to spawn. Used for custom spawn handlers.|
|conn||The connection to set Client Authority to.|
bool True if the object was spawned.
This spawns an object like NetworkServer.Spawn() but also assigns Client Authority to the specified client.
This is the same as calling NetworkIdentity.AssignClientAuthority on the spawned object.