Search for items matching the attributes in the collection.
The attributes should be a table of string keys and string values.
If secret.types.SearchFlags.All is set in flags, then all the items matching the
search will be returned. Otherwise only the first item will be returned.
This is almost always the unlocked item that was most recently stored.
If secret.types.SearchFlags.Unlock is set in flags, then items will be unlocked
if necessary. In either case, locked and unlocked items will match the
search and be returned. If the unlock fails, the search does not fail.
Search for items matching the attributes in the collection. The attributes should be a table of string keys and string values.
If secret.types.SearchFlags.All is set in flags, then all the items matching the search will be returned. Otherwise only the first item will be returned. This is almost always the unlocked item that was most recently stored.
If secret.types.SearchFlags.Unlock is set in flags, then items will be unlocked if necessary. In either case, locked and unlocked items will match the search and be returned. If the unlock fails, the search does not fail.
If secret.types.SearchFlags.LoadSecrets is set in flags, then the items will have their secret values loaded and available via secret.item.Item.getSecret.
This function returns immediately and completes asynchronously.