diff --git a/src/App/Messages/AuthenticationDaemon.purs b/src/App/Messages/AuthenticationDaemon.purs
index d7a2504..dffff2e 100644
--- a/src/App/Messages/AuthenticationDaemon.purs
+++ b/src/App/Messages/AuthenticationDaemon.purs
@@ -164,6 +164,11 @@ codecSearchUser
       { regex:  CAR.optional CA.string
       , offset: CAR.optional CA.int })
 
+{- 13 and 14: these messages are not designed for clients. -}
+{- 15 -}
+type AuthByToken = { token :: String }
+codecAuthByToken ∷ CA.JsonCodec AuthByToken
+codecAuthByToken = CA.object "AuthByToken" (CAR.record { token: CA.string })
 
 {-
 	RESPONSES
@@ -345,6 +350,7 @@ data RequestMessage
   | MkCheckPermission      CheckPermission      -- 10
   | MkSetPermission        SetPermission        -- 11
   | MkSearchUser           SearchUser           -- 12
+  | MkAuthByToken          AuthByToken          -- 15
 
 -- All possible answers from the authentication daemon (authd).
 data AnswerMessage
@@ -395,6 +401,7 @@ encode m = case m of
     (MkCheckPermission      request) -> get_tuple 10 codecCheckPermission request
     (MkSetPermission        request) -> get_tuple 11 codecSetPermission request
     (MkSearchUser           request) -> get_tuple 12 codecSearchUser request
+    (MkAuthByToken          request) -> get_tuple 15 codecAuthByToken request
     where
       get_tuple :: forall a. Int -> CA.JsonCodec a -> a -> Tuple UInt String
       get_tuple num codec request = Tuple (fromInt num) (J.stringify $ CA.encode codec request)