docker login 报错了...

Docker 

Client: Docker Engine - Community
 Version:           18.09.3
 API version:       1.39
 Go version:        go1.10.8
 Git commit:        774a1f4
 Built:             Thu Feb 28 06:32:50 2019
 OS/Arch:           darwin/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          18.09.3
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.10.8
  Git commit:       774a1f4
  Built:            Thu Feb 28 06:40:58 2019
  OS/Arch:          linux/amd64
  Experimental:     true

Error response from daemon: Get https://registry-1.docker.io/v2/: Get https://auth.docker.io/token?account=你的用户名&client_id=docker&offline_token=true&service=registry.docker.io: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers) (Client.Timeout exceeded while awaiting headers)