If key is missing, it'll be created, otherwise ignored or overwritten.
add_to_session(
session,
key = "rave_id",
val = paste(sample(c(letters, LETTERS, 0:9), 20), collapse = ""),
override = FALSE
)If session is shiny session, returns current value stored in
session, otherwise returns NULL
'Shiny' session
character, key to store
value to store
if key exists, whether to overwrite its value