Backport r85640 from trunk

src/ZODB/component.xml

@@ -132,6 +132,16 @@
         read_only_fallback should be true.
       </description>
     </key>
+    <key name="username" required="no">
+      <description>
+        The authentication username of the server.
+      </description>
+    </key>
+    <key name="password" required="no">
+      <description>
+        The authentication password of the server.
+      </description>
+    </key>
     <key name="realm" required="no">
       <description>
         The authentication realm of the server.  Some authentication

src/ZODB/config.py

@@ -152,7 +152,10 @@ class ZEOClient(BaseConfig):
             max_disconnect_poll=self.config.max_disconnect_poll,
             wait=self.config.wait,
             read_only=self.config.read_only,
-            read_only_fallback=self.config.read_only_fallback)
+            read_only_fallback=self.config.read_only_fallback,
+            username=self.config.username,
+            password=self.config.password,
+            realm=self.config.realm)
 
 class BDBStorage(BaseConfig):