[management] Fix potential panic on inactivity expiration log message (…

…#2854)

management/server/account.go

@@ -1249,7 +1249,7 @@ func (am *DefaultAccountManager) peerInactivityExpirationJob(ctx context.Context
 
 		account, err := am.Store.GetAccount(ctx, accountID)
 		if err != nil {
-			log.Errorf("failed getting account %s expiring peers", account.Id)
+			log.Errorf("failed getting account %s expiring peers", accountID)
 			return account.GetNextInactivePeerExpiration()
 		}