fix(#325):updating env.example

.env.example

@@ -11,6 +11,12 @@ SECRET=<the_secret_to_sign_token>
 ADMIN_EMAIL=<nodemailer-sender-email>
 ADMIN_PASS=<nodemailer-google-app-password>
 
+COORDINATOR_EMAIL=<coordinator-email-address>
+COORDINATOR_PASS=<coordinator-email-password>
+
+MANAGER_EMAIL=<manager-email-address>
+MANAGER_PASS=<manager-email-password>
+
 CLOUD_NAME=<cloud-name>
 API_KEY=<cloudinary-api-key>
 API_SECRET=<cloudinary-api-secret>
@@ -23,3 +29,9 @@ TEST_EMAIL=<test-credentials-email>
 TEST_PASS=<test-credentials-password>
 
 FRONTEND_LINK=<redirection-link-for-event-invitations>
+
+REGISTER_FRONTEND_URL=<frontend-url-for-user-registration>
+REGISTER_ORG_FRONTEND_URL=<frontend-url-for-organization-registration>
+
+
+