commit 56b8b8455ddcf6465313f6213394e18aecda2374
Author: himselfv <me@boku.ru>
Date:   Wed Mar 20 16:03:46 2013 +0400

    Hook to let filters guess user (similar to wsl_get_user_by_meta, but custom)

diff --git a/includes/services/wsl.authentication.php b/includes/services/wsl.authentication.php
index e91add6..a63cfe4 100644
--- a/includes/services/wsl.authentication.php
+++ b/includes/services/wsl.authentication.php
@@ -743,6 +743,10 @@ function wsl_process_login_hybridauth_authenticate( $provider, $redirect_to )
 		$user_id = (int) email_exists( $hybridauth_user_profile->emailVerified );
 	}
 
+	// try to guess (reliably) user profile with filters
+	// this allows for looking at other stuff (such as associated OpenID)
+	$user_id = apply_filters('wsl_hook_process_login_reliably_guess_user', $user_id, $provider, $hybridauth_user_profile);
+
 	// try to get user by meta if not
 	if( ! $user_id ){
 		$user_id = (int) wsl_get_user_by_meta( $provider, $hybridauth_user_profile->identifier );