Add a Lock event 'sso login'

README.md

@@ -154,6 +154,7 @@ Lock will emit events during its lifecycle.
 - `signup submit`: emitted when the user clicks on the submit button of the "Sign up" screen.
 - `signup error`: emitted when signup fails. Has the error as an argument.
 - `federated login`: emitted when the user clicks on a social connection button. Has the connection name and the strategy as arguments.
+- `sso login`: emitted when the user clicks on an enterprise SSO connection button. Has the lock ID, connection object, and field name as arguments.
 
 ### show(options)
 

src/connection/enterprise/actions.js

@@ -64,6 +64,11 @@ function logInActiveFlow(id) {
 function logInSSO(id, connection) {
   const m = read(getEntity, 'lock', id);
   const field = databaseLogInWithEmail(m) ? 'email' : 'username';
+  l.emitEvent(m, 'sso login', {
+    lockID: id,
+    connection: connection,
+    field: field
+  });
   coreLogIn(id, [field], {
     connection: connection.get('name'),
     login_hint: getFieldValue(m, field)