requested access to the resource is denied code example
Example 1: docker unable to push repo access denied
# you may need log out first `docker logout` ref. https://stackoverflow.com/a/53835882/248616
docker login
Example 2: denied: requested access to the resource is denied
docker tag firstimage YOUR_DOCKERHUB_NAME/firstimage
Example 3: docker unable to push repo access denied
docker push YOUR_DOCKERHUB_NAME/firstimage