Hello @gdonnal18,
Welcome to the LastPass Community!
I am not sure if you wish your executor to have access to your complete data or just certain data. For security I will recommend never sharing your master password with anyone. If you wish to give this person access to just certain data the best option is that this person create a LastPass account even do it will be a free account and that you make individual shared to that person. You can find steps here: https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/t_sharing_share_item.html&_LANG=enus.
Kind Regards,
Alejandra
LastPass Support