diff --git a/src/user.rs b/src/user.rs
index 56e570d..15766de 100644
--- a/src/user.rs
+++ b/src/user.rs
@@ -21,12 +21,12 @@ pub struct User {
     #[serde(skip_serializing_if = "String::is_empty")]
     pub lastname: String,
     pub email_verified: bool,
-    #[serde(skip_serializing_if = "String::is_empty")]
-    pub date_created: String,
+    // #[serde(skip_serializing_if = "String::is_empty")]
+    pub date_created: Option<time::OffsetDateTime>,
     #[serde(skip_serializing_if = "String::is_empty")]
     pub status: String,
-    #[serde(skip_serializing_if = "String::is_empty")]
-    pub last_login: String,
+    // #[serde(skip_serializing_if = "String::is_empty")]
+    pub last_login: Option<time::OffsetDateTime>,
     #[serde(skip_serializing_if = "init::is_uuid_nil")]
     pub salt_id: uuid::Uuid,
 }
@@ -42,9 +42,9 @@ impl Default for User {
             firstname: String::new(),
             lastname: String::new(),
             email_verified: false,
-            date_created: String::new(),
+            date_created: None,
             status: String::new(),
-            last_login: String::new(),
+            last_login: None,
             salt_id: uuid::Uuid::nil(),
         }
     }