Unauthorized error on hidden node

[yunusemrecatalcam]

We have a hidden node, I can see it as a member on member state graph. I'm running 3 instance of exporter for 3 mongo (1 master and 2 rs). While I can get the metrics from rs that is not hidden, can't get metric from hidden rs. Exporter trying to crawl metric from hidden rs prints an error like this:

level=error msg="Failed to get replSetGetConfig: (Unauthorized) command replSetGetConfig requires authentication." source="replset_conf.go:115

I've tried manually logging in to hidden rs with the same user and querying the same as code do:
db.runCommand( { replSetGetConfig: 1 } );
and it returned the data succesfully which makes us think it's not a authorization issue actually.
Any help is appreciated, thank y'all

[grearter]

@yunusemrecatalcam https://jira.percona.com/browse/PMM-4829