Add query params authentication docs

Author: sagikazarmark

docs/components/authentication.md

@@ -123,6 +123,26 @@ $authentication = Matching::createUrlMatcher(new AuthenticationMethod(), '\/api'
 ```
 
 
+### Query Params
+
+Add authentication details as URL Query params:
+
+`http://api.example.com/endpoint?access_token=9zh987g86fg87gh978hg9g79`
+
+
+``` php
+use Http\Authentication\QueryParams;
+
+$authentication = new QueryParams([
+    'access_token' => '9zh987g86fg87gh978hg9g79',
+]);
+```
+
+!!! warning "Warning:"
+    Using query parameters for authentication is not safe.
+    Only use it when absolutely necessary.
+
+
 ### WSSE
 
 This method implements [WSSE Authentication](http://www.xml.com/pub/a/2003/12/17/dive.html).