added instructions on how to delete a user (argoproj#14488)

Signed-off-by: Christian Hernandez <[email protected]>
Co-authored-by: pasha-codefresh <[email protected]>

docs/operator-manual/user-management/index.md

@@ -44,6 +44,24 @@ Each user might have two capabilities:
 * apiKey - allows generating authentication tokens for API access
 * login - allows to login using UI
 
+### Delete user
+
+In order to delete a user, you must remove the corresponding entry defined in the `argocd-cm` ConfigMap:
+
+Example:
+
+```bash
+kubectl patch -n argocd cm argocd-cm --type='json' -p='[{"op": "remove", "path": "/data/accounts.alice"}]'
+```
+
+It is recommended to also remove the password entry in the `argocd-secret` Secret:
+
+Example:
+
+```bash
+kubectl patch -n argocd secrets argocd-secret --type='json' -p='[{"op": "remove", "path": "/data/accounts.alice.password"}]'
+```
+
 ### Disable admin user
 
 As soon as additional users are created it is recommended to disable `admin` user: