diff --git a/dudeswave_web/src/Makefile b/dudeswave_web/src/Makefile
index 75e14ed..94f3c27 100644
--- a/dudeswave_web/src/Makefile
+++ b/dudeswave_web/src/Makefile
@@ -8,6 +8,7 @@ ERLFLAGS=	-I ../../
 OBJS=	dudeswave_web.beam dudeswave_web_app.beam
 OBJS+=	dudeswave_web_supervisor.beam dudeswave_web_handler.beam
 OBJS+=	dudeswave_web_user_handler.beam dudeswave_web_common.beam
+OBJS+=	dudeswave_web_auth_handler.beam
 
 all: ${OBJS}
 
diff --git a/dudeswave_web/src/dudeswave_web_auth_handler.erl b/dudeswave_web/src/dudeswave_web_auth_handler.erl
index ed59839..16923cf 100644
--- a/dudeswave_web/src/dudeswave_web_auth_handler.erl
+++ b/dudeswave_web/src/dudeswave_web_auth_handler.erl
@@ -13,7 +13,7 @@
 % ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 % OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 %
--module(dudeswave_auth_handler).
+-module(dudeswave_web_auth_handler).
 -moduledoc """
 JSON API to authenticate users.
 
@@ -94,9 +94,10 @@ forbidden(Req, State) ->
 		<<"POST">> ->
 			{false, Req, State};
 		_ ->
-			{User, Auth} = dudeswave_web_common:auth_cookies(Req),
+			{User, Cookie} = dudeswave_web_common:auth_cookies(Req),
+			Host = cowboy_req:host(Req),
 
-			case dudeswave_backend:auth(cookie, User, Cookie) of
+			case dudeswave_backend:auth(cookie, User, Host, Cookie) of
 				{error, service_unavailable} -> exit(service_unavailable);
 				true -> {false, Req, State};
 				false -> {true, Req, State}
@@ -113,8 +114,9 @@ content_types_accepted(Req, State) ->
 
 resource_exists(Req, State) ->
 	{User, _} = dudeswave_web_common:auth_cookies(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:user_details(User) of
+	case dudeswave_backend:user_details(User, Host) of
 		[] ->
 			{false, Req, State};
 		{error, Reason} ->
@@ -136,8 +138,9 @@ allow_missing_post(Req, State) -> {false, Req, State}.
 
 delete_resource(Req, State) ->
 	{User, Auth} = dudeswave_web_common:auth_cookies(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:logout(User, Auth) of
+	case dudeswave_backend:logout(User, Host, Auth) of
 		ok ->
 			{true, invalidate_cookies(Req), State};
 		{error, _} ->
@@ -152,8 +155,9 @@ delete_completed(Req, State) -> {false, Req, State}.
 
 login(Req, State) ->
 	{User, Pass, Req0} = read_login_data(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:auth(password, User, Pass) of
+	case dudeswave_backend:auth(password, User, Host, Pass) of
 		{true, Cookie, Validity} ->
 			{true, set_auth_cookies(Req, User, Cookie, Validity), State};
 		false ->
diff --git a/dudeswave_web/src/dudeswave_web_user_handler.erl b/dudeswave_web/src/dudeswave_web_user_handler.erl
index 77468a4..a060f77 100644
--- a/dudeswave_web/src/dudeswave_web_user_handler.erl
+++ b/dudeswave_web/src/dudeswave_web_user_handler.erl
@@ -139,8 +139,9 @@ forbidden(Req, State) ->
 			{false, Req, State};
 		_ ->
 			{User, Auth} = dudeswave_web_common:auth_cookies(Req),
+			Host = cowboy_req:host(Req),
 
-			case dudeswave_backend:auth(cookie, User, Auth) of
+			case dudeswave_backend:auth(cookie, User, Host, Auth) of
 				{error, service_unavailable} -> {true, Req, State};
 				true -> {false, Req, State};
 				false -> {true, Req, State}
@@ -169,8 +170,9 @@ content_types_accepted(Req, State) ->
 
 resource_exists(Req, State) ->
 	{User, _} = dudeswave_web_common:auth_cookies(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:user_details(User) of
+	case dudeswave_backend:user_details(User, Host) of
 		[] ->
 			{false, Req, State};
 		{error, _} ->
@@ -195,8 +197,9 @@ allow_missing_post(Req, State) -> {false, Req, State}.
 
 delete_resource(Req, State) ->
 	{User, _} = dudeswave_web_common:auth_cookies(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:delete_user(User) of
+	case dudeswave_backend:delete_user(User, Host) of
 		ok -> {true, Req, State};
 		{error, _} -> {false, Req, State}
 	end.
@@ -209,8 +212,9 @@ delete_completed(Req, State) -> {true, Req, State}.
 
 create_user(Req, State) ->
 	{User, Pass, Email, Req0} = read_new_user_data(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:new_user(User, Pass, Email) of
+	case dudeswave_backend:new_user(User, Host, Pass, Email) of
 		ok -> {true, Req0, []};
 		{error, _} -> {false, Req0, State}
 	end.
@@ -218,8 +222,9 @@ create_user(Req, State) ->
 modify_user(Req, State) ->
 	{User, _} = dudeswave_web_common:auth_cookies(Req),
 	{Email, Desc, Name, Req0} = read_update_user_data(Req),
+	Host = cowboy_req:host(Req),
 
-	case dudeswave_backend:update_user(User, Name, Email, Desc) of
+	case dudeswave_backend:update_user(User, Host, Name, Email, Desc) of
 		ok -> {true, Req0, []};
 		{error, _} -> {false, Req0, State}
 	end.