+ enum ReturnCode
+ {
+ REJECT, // Reject the request immediately.
+ FAIL, // Module failed.
+ OK, // Module is OK, continue.
+ HANDLED, // The request is handled, no further handling.
+ INVALID, // The request is invalud.
+ USERLOCK, // Reject the request, user is locked.
+ NOTFOUND, // User not found.
+ NOOP, // Module performed no action.
+ UPDATED // Module sends some updates.
+ };