Shared Mailbox in Microsoft graph in C#

I'm trying to look for a way to identify shared mailbox and/or convert a regular mailbox to shared in C#.

From what I tried to look for I found nothing using GraphServiceClient.

I'm referring to getting a user with:

var users = await graphServiceClient.Users.Request().GetAsync();

or

var users = await graphServiceClient.Users.Request().Select("MailboxSettings").GetAsync();

and identifying if the user has a regular mailbox or shared.

Note: Not talking about shared folders

is there a way using Microsoft.Graph or any other way to identify and/or convert mailbox in asp?