move policy out of iam

policy/src/auth.rs

@@ -0,0 +1,33 @@
+mod credentials;
+
+pub use credentials::Credentials;
+pub use credentials::*;
+use serde::{Deserialize, Serialize};
+use time::OffsetDateTime;
+
+#[derive(Serialize, Deserialize, Clone, Debug, Default)]
+pub struct UserIdentity {
+    pub version: i64,
+    pub credentials: Credentials,
+    pub update_at: Option<OffsetDateTime>,
+}
+
+impl UserIdentity {
+    pub fn new(credentials: Credentials) -> Self {
+        UserIdentity {
+            version: 1,
+            credentials,
+            update_at: Some(OffsetDateTime::now_utc()),
+        }
+    }
+}
+
+impl From<Credentials> for UserIdentity {
+    fn from(value: Credentials) -> Self {
+        UserIdentity {
+            version: 1,
+            credentials: value,
+            update_at: Some(OffsetDateTime::now_utc()),
+        }
+    }
+}