+ Login page and web sessions

+ /control/login
+ /control/logout

openapi/README.md

@@ -11,3 +11,12 @@ The easiest way would be to use [Swagger Editor](http://editor.swagger.io/) and
 1. `yarn install`
 2. `yarn start`
 3. Open `http://localhost:4000/`
+
+
+### Authentication
+
+If AdGuard Home's web user is password-protected, a web client must use authentication mechanism when sending requests to server.  Basic access authentication is the most simple method - a client must pass `Authorization` HTTP header along with all requests:
+
+    Authorization: Basic BASE64_DATA
+
+where BASE64_DATA is base64-encoded data for `username:password` string.