Check if login stream was canceled before printing warn (#451)

README.md

@@ -54,9 +54,9 @@ NetBird creates an overlay peer-to-peer network connecting machines automaticall
 - \[x] Kernel WireGuard usage when possible.
 - \[x] Access Controls - groups & rules.
 - \[x] Remote SSH access without managing SSH keys.
+- \[x] Network Routes.  
 
 **Coming soon:**
--  \[ ] Network Routes.
 -  \[ ] Private DNS.
 -  \[ ] Mobile clients.
 -  \[ ] Network Activity Monitoring.

client/internal/login.go

@@ -36,7 +36,10 @@ func Login(ctx context.Context, config *Config, setupKey string, jwtToken string
 	defer func() {
 		err = mgmClient.Close()
 		if err != nil {
-			log.Warnf("failed to close the Management service client %v", err)
+			cStatus, ok := status.FromError(err)
+			if !ok || ok && cStatus.Code() != codes.Canceled {
+				log.Warnf("failed to close the Management service client, err: %v", err)
+			}
 		}
 	}()