An automated login process is provided for a user connecting to a first server of multiple servers that are connected via a computer network. For stateless Web services, the present invention provides an invoker API that allows a client to invoke a specific resource and perform an operation on the resource. The metallic member has portions engaged with a rotor body. Accordingly, correct measurements can be performed even if the position of the movable element 9 should fluctuate, for example, as a result of deformation of the guiding and holding plate 7 or guide 8. Occurrences of the analysis user log features that are associated with a user in the target user group are extracted and reformatted for the analysis specified in the analysis request. The optical scanner scans a surface by means of a plurality of light beams in which the polarization direction of at least one of the light beams is different from the polarization directions of the other light beams.