User manual

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User management（see picture 5.53）
Fig.5.53
【add user】： enter user name such as “guest” and password. And then select “authority”
and click “add” to add a new user
【delete user】： select targeted user and click “delete” to delete this user
【change password】：Select the user you want to modify in the " User selection", enter
the new password, click on "Change Password".