'why can I still docker pull after docker logout

context(what I do while using docker):

my question is, why does docker pull/push cmd still work after docker logout? I tested on my own Ubuntu.

docker docker-registry

Solution 1:^[1]

finally I found the answer!

it relates with the access level in harbor.

if the repository's access level is public, you can do 'docker pull image', could not do 'docker push image'

if the repository's access level is private, neither 'docker pull image' nor 'docker push image'

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Solution	Source
Solution 1	stack-overflow-bolin