new setting allows administrator to determine if users should be redirected when their acces token expires.

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

@@ -159,7 +159,10 @@ class OpenID_Connect_Generic_Client_Wrapper {
 
 		if ( ! $refresh_token ) {
 			wp_logout();
-			$this->error_redirect( new WP_Error( 'access-token-expired', __( 'Session expired. Please login again.' ) ) );
+
+			if ( $this->settings->redirect_on_logout ) {
+				$this->error_redirect( new WP_Error( 'access-token-expired', __( 'Session expired. Please login again.' ) ) );
+			}
 		}
 
 		$token_result = $this->client->request_new_tokens( $refresh_token );

includes/openid-connect-generic-settings-page.php

@@ -163,6 +163,12 @@ class OpenID_Connect_Generic_Settings_Page {
 				'type'        => 'checkbox',
 				'section'     => 'user_settings',
 			),
+			'redirect_on_logout'   => array(
+				'title'       => __( 'Redirect to the login screen session is expired' ),
+				'description' => __( 'When enabled, this will automatically redirect the user back to the WordPress login page if their access token has expired.' ),
+				'type'        => 'checkbox',
+				'section'     => 'user_settings',
+			),
 			'enable_logging'    => array(
 				'title'       => __( 'Enable Logging' ),
 				'description' => __( 'Very simple log messages for debugging purposes.' ),

openid-connect-generic.php

@@ -207,8 +207,9 @@ class OpenID_Connect_Generic {
 				'alternate_redirect_uri' => 0,
 				'link_existing_users' => 0,
 				'redirect_user_back' => 0,
+				'redirect_on_logout' => 1,
 				'enable_logging'  => 0,
-				'log_limit'       => 1000, 
+				'log_limit'       => 1000,
 			)
 		);