stub of registration resource

service/src/main/java/com/telephoners/krakyournet/ctf/resources/RegistrationResource.java

@@ -44,9 +44,10 @@ public class RegistrationResource
 
     @GET
     @Path("/user")
-    public void register(@QueryParam("userName") final String userName,
+    public String register(@QueryParam("userName") final String userName,
                            @QueryParam("teamId") final String teamId)
     {
+        //todo: check if exists
         if (!teamsRepository.contains(teamId))
         {
             throw new RuntimeException("Team does not exist");
@@ -58,5 +59,8 @@ public class RegistrationResource
         user.setPassword("password");
         user.setAdmin(false);
         user.setTeamId(teamId);
+        userRepository.add(user);
+
+        return user.getId();
     }
 }