reuse session for loggined user.

apiV1login.go

 	}
 	//log in user
 	if u.Id == ss.User {
-		ss.RenewIfExpireSoon()
+		*ss = trial //we are the same
+	} else if !ss.IsEmpty() {
+		ss.ReuseAsUser(u.Id, ss.Expire)
 	} else {
 		ss.InitForUser(ss.User, time.Now().Add(loan.DefaultSessionDuration))
 	}

main.go

 	ar := apiV1ResponseBlank()
 	ar.Env.Msg = msg
 	ar.Env.Session = *ss
+	ar.Env.Session.Bin = []byte("masked data") //clear
 	ar.Env.Session.Secret = "***********"
 	ar.add("Body", dumpLines)
 	b, _ := ar.toJson()