extend userbackend for avatar

Signed-off-by: Rick Bruyninckx <xactme@gmail.com>

Author: RickBruyninckx

lib/UserBackend.php

@@ -511,6 +511,12 @@ private function formatUserData($attributes) {
 			$result['formatted']['mfaVerified'] = null;
 		}
 
+		try {
+			$result['formatted']['avatar'] = $this->getAttributeValue('saml-attribute-mapping-avatar_mapping', $attributes);
+		} catch (\InvalidArgumentException $e) {
+			$result['formatted']['avatar'] = null;
+		}
+
 		$result['formatted']['uid'] = $this->userData->getEffectiveUid();
 
 		return $result;