Lists folders (previously called projects) belonging to the account.
My Library folders are not included.

For tokens scoped to a specific user (all:delegate_to_contact_permissions),
results are limited to folders that user can see in their content library:
folders shared with them directly, through a contact group, or with the
whole account (owners and managers see every folder). Public (unlocked)
folders the user has no sharing on remain viewable by link but are not
listed.

Requires api token with one of the following permissions

Read all folder and media data

Tokens with the "Act with a team member's permissions" permission
(all:delegate_to_contact_permissions scope) can also be used. Requests
made with such a token are authorized using the permissions of the
contact assigned to the token.

An expiring access token
created with the all:delegate_to_contact_permissions scope can also be
used. Results are limited to the folders its authorizations name (any
permission granted on a folder qualifies it), filtered as they would be
for the contact the token was created for.