diff --git a/zomp/lib/otpr-zx/0.1.0/src/zx.erl b/zomp/lib/otpr-zx/0.1.0/src/zx.erl
index e8c1414..c9b8423 100644
--- a/zomp/lib/otpr-zx/0.1.0/src/zx.erl
+++ b/zomp/lib/otpr-zx/0.1.0/src/zx.erl
@@ -28,7 +28,7 @@
               identifier/0,
               option/0,
               host/0,
-              key_id/0, key_name/0,
+              key_id/0, key_name/0, key_data/0,
               user/0, username/0, lower0_9/0, label/0,
               package_meta/0]).
 
@@ -51,8 +51,12 @@
 -type host()            :: {string() | inet:ip_address(), inet:port_number()}.
 -type key_id()          :: {realm(), key_name()}.
 -type key_name()        :: lower0_9().
--type user()            :: {realm(), username()}.
--type username()        :: label().
+-type key_data()        :: {key_id(), public | private, binary()}.
+-type user_id()         :: {realm(), user_name()}.
+-type user_name()       :: label().
+-type user_data()       :: {ID       :: user_id(),
+                            RealName :: string(),
+                            Email    :: string()}.
 -type lower0_9()        :: [$a..$z | $0..$9 | $_].
 -type label()           :: [$a..$z | $0..$9 | $_ | $- | $.].
 -type package_meta()    :: #{package_id := package_id(),