Header User can be configured by editing the header-user.cfg.xml file. The user can specify the following information: List of headers to identify the incoming user. Header to identify incoming user. This header key is applied to the x-pp-group header. The header value associated with this key is applied to the x-pp-user header. Quality assigned to users found in the request headers. If no quality is set, Repose will default this value to 0.1 Quality factors are defined in the HTTP RFC - Section-3.9 (for usage examples, see HTTP RFC - Section 14.1) as a mechanism for weighting values in multi-value headers. Possible values for quality are 0 to 1.0.