Out of curiosity I went back and pulled up the wills I did for family members last year to check the wording. Now I am not a lawyer so I cannot and am not giving legal advice, but this type of language is what can go into a will...

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Digital Assets. My executor may access, handle, distribute, and dispose of my digital assets, and may obtain, access, modify, delete, and control my passwords and othis electronic credentials associated with my digital devices and digital assets.

For the purpose of this Will, “digital assets” includes the following:
Files stored on my digital devices, including but not limited to, desktops, laptops, tablets, periphisals, storage devices, mobile telephones, smartphones, and any similar digital device now or later developed; and
Emails received and sent, email accounts, digital music, digital photographs, digital videos, software licenses, social network accounts, file sharing accounts, financial accounts, banking accounts, domain registrations, DNS service accounts, web hosting accounts, tax preparation service accounts, online stores, loyalty program accounts, affiliate programs, othis online accounts and similar digital items, regardless of the ownership of any physical device upon which the digital item is stored.