.... many other lines
-image: registry.hub.docker.com/MY_DOCKER_HUB_USERNAME/MY_IMAGE_NAME:latest

Failed to pull image "registry.hub.docker.com/MY_DOCKER_HUB_USERNAME/MY_IMAGE_NAME:latest":
image pull failed for registry.hub.docker.com/MY_DOCKER_HUB_USERNAME/MY_IMAGE_NAME:latest,
this may be because there are no credentials on this request.
details: (Error: image MY_DOCKER_HUB_USERNAME/MY_IMAGE_NAME not found)