Support querying for sessions by user identifier

Fixes gh-7

samples/findbyusername/src/main/java/sample/mvc/LoginController.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2002-2015 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package sample.mvc;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+/**
+ * Returns view for log in page
+ *
+ * @author Rob Winch
+ */
+@Controller
+public class LoginController {
+
+	@RequestMapping("/login")
+	public String login() {
+		return "login";
+	}
+}