diff --git a/.idea/libraries/Dart_Packages.xml b/.idea/libraries/Dart_Packages.xml
deleted file mode 100644
index de4f5535..00000000
--- a/.idea/libraries/Dart_Packages.xml
+++ /dev/null
@@ -1,596 +0,0 @@
-<component name="libraryTable">
-  <library name="Dart Packages" type="DartPackagesLibraryType">
-    <properties>
-      <option name="packageNameToDirsMap">
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-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/matcher-0.12.1+4/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/merge_map-1.0.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/meta-1.1.2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/mime-0.9.5/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/mock_request-1.0.2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/multi_server_socket-1.0.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/node_preamble-1.4.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/package_config-1.0.3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/package_resolver-1.0.2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/path-1.5.1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/plugin-0.2.0+2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/pool-1.3.3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/pub_semver-1.3.2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/quiver-0.22.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/quiver_hashcode-1.0.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/random_string-0.0.1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/shelf-0.7.1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/shelf_packages_handler-1.0.3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/shelf_static-0.2.6/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/shelf_web_socket-0.2.2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/source_map_stack_trace-1.1.4/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/source_maps-0.10.4/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/source_span-1.4.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/stack_trace-1.9.1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/stream_channel-1.6.3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/string_scanner-1.0.2/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/term_glyph-1.0.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/test-0.12.29+1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/tuple-1.0.1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/typed_data-1.1.5/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/utf-0.9.0+3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/uuid-0.5.3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/vector_math-1.4.7/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/watcher-0.9.7+4/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/web_socket_channel-1.0.6/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/yaml-2.1.13/lib" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/libraries/Dart_SDK.xml b/.idea/libraries/Dart_SDK.xml
deleted file mode 100644
index 2255dbd8..00000000
--- a/.idea/libraries/Dart_SDK.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<component name="libraryTable">
-  <library name="Dart SDK">
-    <CLASSES>
-      <root url="file:///usr/local/opt/dart/libexec/lib/async" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/collection" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/convert" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/core" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/developer" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/html" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/indexed_db" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/io" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/isolate" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/js" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/js_util" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/math" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/mirrors" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/svg" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/typed_data" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/web_audio" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/web_gl" />
-      <root url="file:///usr/local/opt/dart/libexec/lib/web_sql" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index 639900d1..00000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectRootManager">
-    <output url="file://$PROJECT_DIR$/out" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
deleted file mode 100644
index af25876f..00000000
--- a/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/security.iml" filepath="$PROJECT_DIR$/security.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/runConfigurations/tests_in_security.xml b/.idea/runConfigurations/tests_in_security.xml
deleted file mode 100644
index 85440c0d..00000000
--- a/.idea/runConfigurations/tests_in_security.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="tests in security" type="DartTestRunConfigurationType" factoryName="Dart Test" singleton="true" nameIsGenerated="true">
-    <option name="filePath" value="$PROJECT_DIR$" />
-    <option name="scope" value="FOLDER" />
-    <option name="testRunnerOptions" value="-j 4" />
-    <method />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index 35eb1ddf..00000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="" vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/example/rate_limit.dart b/example/rate_limit.dart
new file mode 100644
index 00000000..c8a2387e
--- /dev/null
+++ b/example/rate_limit.dart
@@ -0,0 +1,7 @@
+import 'package:angel_framework/angel_framework.dart';
+import 'package:angel_framework/http.dart';
+import 'package:angel_security/angel_security.dart';
+
+main() async {
+  var app = Angel(), http = AngelHttp(app);
+}
diff --git a/lib/src/rate_limiter.dart b/lib/src/rate_limiter.dart
index e7c08a88..20b58598 100644
--- a/lib/src/rate_limiter.dart
+++ b/lib/src/rate_limiter.dart
@@ -1,8 +1,13 @@
+import 'dart:async';
 import 'package:angel_framework/angel_framework.dart';
 
 /// A base class that facilitates rate limiting API's or endpoints,
 /// typically to prevent spam and abuse.
-abstract class RateLimiter {
+///
+/// The rate limiter operates under the assumption that a [User] object
+/// can be computed from each request, as well as information about
+/// the current rate-limiting window.
+abstract class RateLimiter<User> {
   /// The maximum number of requests allowed within the given [window].
   final int maxRequestsPerWindow;