diff --git a/src/main/java/org/gcube/common/authorization/utils/user/KeycloakUser.java b/src/main/java/org/gcube/common/authorization/utils/user/KeycloakUser.java
index b477e77..45ef517 100644
--- a/src/main/java/org/gcube/common/authorization/utils/user/KeycloakUser.java
+++ b/src/main/java/org/gcube/common/authorization/utils/user/KeycloakUser.java
@@ -21,7 +21,7 @@ public class KeycloakUser extends AccessToken implements User {
 	@Override
 	@JsonIgnore
 	public String getUsername() {
-		return getId();
+		return (String) getOtherClaims().getOrDefault("preferred_username", getId());
 	}
 
 	@Override