diff -r 1091cb3c6dad -r 165811ea12ab docs/src/configuration.md
--- a/docs/src/configuration.md	Sun Dec 15 10:44:11 2019 +0100
+++ b/docs/src/configuration.md	Sun Dec 15 12:11:16 2019 +0100
@@ -41,6 +41,13 @@
 Type: base64 string \
 Example: `<password>MTIzNDU2Nzg=</password>`
 
+### stored-user
+
+Credentials id used for authentication. The credentials must be stored in the secret store.
+
+Type: string \
+Example: `<stored-user>alice</stored-user>`
+
 ### default-key
 
 Identifer of the key used by default for encryption. There must be a configured key with this name.