Update README.md

README.md

@@ -19,7 +19,7 @@ API
     sdk/0                % JavaScript for page embedding for JavaScript based login methods
     login_button/0       % HTML Button for page embedding
     event/1              % Page Event for HTTP redirect based login methods
-    api_event/0          % Page Event for JavaScript based login methods
+    api_event/3          % Page Event for JavaScript based login methods
     callback/0           % Callback part of HTTP redirect based login methods
     registration_data/3  % Process Parameters