private void SetDefaults(UserSettings settings)
 {
     SelectedEnvironment   = EnvironmentList?.FirstOrDefault(env => env == settings.Environment);
     SelectedAgentLocation =
         AgentLocationList.FirstOrDefault(loc => loc.AgentStateCode == settings.AgentLocation) ??
         AgentLocationList.First();
     SelectedAgent = AgentList.FirstOrDefault(agent => agent.AgentId == settings.AgentId) ??
                     AgentList.First();
     SelectedAgentPos = AgentPosList.FirstOrDefault(agentPos => agentPos.AgentSequence == settings.AgentPosId) ??
                        AgentPosList.First();
 }