[docs] Note that cred store values must not be empty

Resolves: #182
pythongssapi · Aug 21, 2019 · 62006b2 · 62006b2
1 parent 608a142
commit 62006b2
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/docs/source/credstore.rst b/docs/source/credstore.rst
@@ -13,6 +13,11 @@ operations.
    share the same or similar keywords, but their meaning is always local to a
    specific mechanism.
 
+.. note:
+
+   `None` is not a permitted value and will raise exceptions.  Phrased
+   differently, values must be strings, not empty.
+
 The krb5 mechanism in MIT libraries
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