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diff --git a/docs/podman-container-runlabel.1.md b/docs/podman-container-runlabel.1.md
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--- a/docs/podman-container-runlabel.1.md
+++ b/docs/podman-container-runlabel.1.md
@@ -54,6 +54,9 @@ Any additional arguments will be appended to the command.
Path of the authentication file. Default is ${XDG_RUNTIME\_DIR}/containers/auth.json, which is set using `podman login`.
If the authorization state is not found there, $HOME/.docker/config.json is checked, which is set using `docker login`.
+Note: You can also override the default path of the authentication file by setting the REGISTRY\_AUTH\_FILE
+environment variable. `export REGISTRY_AUTH_FILE=path`
+
**--display**
Display the label's value of the image having populated its environment variables.