[##6174] added metrics for logged contacts

Author: Raushan Kumar Raman

app/controllers/health_controller.rb

@@ -53,7 +53,7 @@ def monthly_unique_users_graph_data
     monthly_counts_of_volunteers = LoginActivity.joins("INNER JOIN users ON users.id = login_activities.user_id AND login_activities.user_type = 'User'").where(users: {type: "Volunteer"}, success: true).group_by_month(:created_at, format: "%b %Y").distinct.count(:user_id)
     monthly_counts_of_supervisors = LoginActivity.joins("INNER JOIN users ON users.id = login_activities.user_id AND login_activities.user_type = 'User'").where(users: {type: "Supervisor"}, success: true).group_by_month(:created_at, format: "%b %Y").distinct.count(:user_id)
     monthly_counts_of_casa_admins = LoginActivity.joins("INNER JOIN users ON users.id = login_activities.user_id AND login_activities.user_type = 'User'").where(users: {type: "CasaAdmin"}, success: true).group_by_month(:created_at, format: "%b %Y").distinct.count(:user_id)
-    monthly_logged_counts_of_volunteers = CaseContact.joins(:supervisor_volunteer).group_by_month(:created_at, format: "%b %Y").distinct.count(:creator_id)
+    monthly_logged_counts_of_volunteers = CaseContact.joins(supervisor_volunteer: :volunteer).group_by_month(:created_at, format: "%b %Y").distinct.count(:creator_id)
 
     monthly_line_graph_combined_data = first_day_of_last_12_months.map do |month|
       [