refactor: refactoring notification service to use new service registry hooks

pkg/api/org_invite.go

@@ -60,7 +60,9 @@ func AddOrgInvite(c *m.ReqContext, inviteDto dtos.AddInviteForm) Response {
 	}
 
 	// send invite email
+	c.Logger.Error("sending?")
 	if inviteDto.SendEmail && util.IsEmail(inviteDto.LoginOrEmail) {
+		c.Logger.Error("yes sending?")
 		emailCmd := m.SendEmailCommand{
 			To:       []string{inviteDto.LoginOrEmail},
 			Template: "new_user_invite.html",