You can see the credentials that used by n8n nodes by navigating to executions tab and choose the node that you want to see.
2. you can, just edit the authentication from related n8n node with the new one
Not exactly ideal when trying to audit an entire workspace.
Right, I guess this is the straightforward answer… unless it’s switching the type of credential, like Header Auth to Oauth, in which every node in every workflow would need to get updated, right?