Add example command for how to find SHA1 of an external ID
Change-Id: Iab96ab10c65cd3b1935cd5ff6f4fa671b89b3095
diff --git a/Documentation/config-accounts.txt b/Documentation/config-accounts.txt
index 33ee290..e5137fe 100644
--- a/Documentation/config-accounts.txt
+++ b/Documentation/config-accounts.txt
@@ -296,6 +296,16 @@
This ensures that an external ID is used only once (e.g. an external ID can
never be assigned to multiple accounts at a point in time).
+The following commands show how to find the SHA1 of an external ID:
+
+----
+$ echo -n 'gerrit:jdoe' | shasum
+7c2a55657d911109dbc930836e7a770fb946e8ef -
+
+$ echo -n 'username:jdoe' | shasum
+e0b751ae90ef039f320e097d7d212f490e933706 -
+----
+
[IMPORTANT]
If the external ID key is changed manually you must adapt the note key
to the new SHA1, otherwise the external ID becomes inconsistent and is
