is it possible to set expiration to minutes? like 1 minute?
can I pass the "1/60.0" to the function to get the expected 1 minute?
No, you can only pass a number greater than or equal to 0 here. For socket messages leaving this value blank will mean that the player will receive it the next time they come online. Setting it to 0 means it will be automatically dismissed if the player is not online.