added force_redirect parameter and login action

includes/openid-connect-generic-client-wrapper.php

@@ -378,7 +378,9 @@ class OpenID_Connect_Generic_Client_Wrapper {
 
 		// login the found / created user
 		$this->login_user( $user, $token_response, $id_token_claim, $user_claim, $subject_identity  );
-		
+
+		do_action( 'openid-connect-generic-user-logged-in', $user );
+
 		// log our success
 		$this->logger->log( "Successful login for: {$user->user_login} ({$user->ID})", 'login-success' );
 

includes/openid-connect-generic-login-form.php

@@ -39,7 +39,8 @@ class OpenID_Connect_Generic_Login_Form {
 	 */
 	function handle_redirect_login_type_auto()
 	{
-		if ( $GLOBALS['pagenow'] == 'wp-login.php' && $this->settings->login_type == 'auto'
+		if ( $GLOBALS['pagenow'] == 'wp-login.php'
+            && ( $this->settings->login_type == 'auto' || ! empty( $_GET['force_redirect'] ) )
 			&& ( ! isset( $_GET[ 'action' ] ) || $_GET[ 'action' ] !== 'logout' )
 			&& ! isset( $_POST['wp-submit'] ) )
 		{