Popstore users who have popstore management privileges but lack
    operating system privileges must log in to their account with
    the LOGIN command in order to perform management operations.
    Once logged in, the utility will then allow the user to perform
    management operations. Users who have operating system privileges
    (e.g., SYSPRV and SYSLCK privileges on OpenVMS), need not log in
    to their account.

    To log in to a popstore account, the popstore account's username
    should be supplied using the username parameter to the LOGIN
    command. If the username parameter is omitted, the utility will
    use the name of the operating system account under which the user
    is logged in. The utility will then prompt for a password. If
    the correct password for the popstore account is supplied, and
    the account has the manage flag set, then the utility will allow
    management operations to be undertaken using the utility's image
    privileges.

    A popstore account is granted management privileges by specifying

    /FLAGS=MANAGE

    when creating or modifying it with the ADD or MODIFY commands.

    See also the LOGOUT command.