diff --git a/.gitea/workflows/tag_release.yaml b/.gitea/workflows/tag_release.yaml
index 6a11acb..b4106cc 100644
--- a/.gitea/workflows/tag_release.yaml
+++ b/.gitea/workflows/tag_release.yaml
@@ -19,7 +19,7 @@ jobs:
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.85.0
+          toolchain: 1.86.0
           components: cargo
 
       - name: Extract Version from Cargo.toml
diff --git a/.gitea/workflows/workflow.yaml b/.gitea/workflows/workflow.yaml
index cf14ef2..ac7c0a1 100644
--- a/.gitea/workflows/workflow.yaml
+++ b/.gitea/workflows/workflow.yaml
@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: 1.85.0
+          toolchain: 1.86.0
       - run: cargo check
 
   test:
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: 1.85.0
+          toolchain: 1.86.0
       - run: cargo test
 
   fmt:
@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: 1.85.0
+          toolchain: 1.86.0
       - run: rustup component add rustfmt
       - run: cargo fmt --all -- --check
 
@@ -49,7 +49,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: 1.85.0
+          toolchain: 1.86.0
       - run: rustup component add clippy
       - run: cargo clippy -- -D warnings
 
@@ -60,7 +60,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: 1.85.0
+          toolchain: 1.86.0
       - run: cargo build
 
 
diff --git a/Cargo.toml b/Cargo.toml
index 585bb1e..261f79b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,8 @@
 [package]
 name = "icarus_models"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2024"
+rust-version = "1.86"
 description = "models used for the icarus project"
 license = "MIT"
 
@@ -9,6 +10,7 @@ license = "MIT"
 serde = { version = "1.0.218", features = ["derive"] }
 serde_json = { version = "1.0.139" }
 rand = { version = "0.9" }
+time = { version = "0.3.41", features = ["formatting", "macros", "parsing", "serde"] }
 uuid = { version = "1.16.0", features = ["v4", "serde"] }
 [dev-dependencies]
 tempfile = { version = "3.19.1" }
diff --git a/src/user.rs b/src/user.rs
index 6efeb3c..5095618 100644
--- a/src/user.rs
+++ b/src/user.rs
@@ -21,12 +21,14 @@ 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(with = "time::serde::rfc3339::option")]
+    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(with = "time::serde::rfc3339::option")]
+    pub last_login: Option<time::OffsetDateTime>,
+    #[serde(skip_serializing_if = "init::is_uuid_nil")]
+    pub salt_id: uuid::Uuid,
 }
 
 impl Default for User {
@@ -40,9 +42,10 @@ 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(),
         }
     }
 }
@@ -56,3 +59,29 @@ impl User {
         }
     }
 }
+
+pub mod salt {
+    use std::default::Default;
+
+    use crate::init;
+
+    use serde::{Deserialize, Serialize};
+
+    #[derive(Clone, Debug, Default, Deserialize, Serialize)]
+    pub struct Salt {
+        #[serde(skip_serializing_if = "init::is_uuid_nil")]
+        pub id: uuid::Uuid,
+        #[serde(skip_serializing_if = "String::is_empty")]
+        pub salt: String,
+    }
+
+    impl Salt {
+        pub fn to_json(&self, output_pretty: bool) -> Result<String, serde_json::Error> {
+            if output_pretty {
+                serde_json::to_string_pretty(&self)
+            } else {
+                serde_json::to_string(&self)
+            }
+        }
+    }
+}