Logging.

Author: dkocher

oauth/src/main/java/ch/cyberduck/core/oauth/OAuth2AuthorizationService.java

@@ -169,6 +169,7 @@ public OAuthTokens save(final OAuthTokens tokens) throws LocalAccessDeniedExcept
                     for(String claim : new String[]{"preferred_username", "email", "name", "nickname", "sub"}) {
                         final String value = jwt.getClaim(claim).asString();
                         if(StringUtils.isNotBlank(value)) {
+                            log.debug("Set username to {} from claim {}", value, claim);
                             credentials.setUsername(value);
                             break;
                         }