add auth persistence

backend/src/auth.rs

@@ -1,3 +1,4 @@
+use crate::auth_persistence::AuthStorage;
 use crate::items;
 use crate::proto_utils::Proto;
 use rocket::State;
@@ -8,12 +9,16 @@ use uuid::Uuid;
 pub struct AuthState {
     // Map token -> username
     tokens: Mutex<HashMap<String, String>>,
+    storage: AuthStorage,
 }
 
 impl AuthState {
     pub fn new() -> Self {
+        let storage = AuthStorage::new();
+        let tokens = storage.load_tokens();
         Self {
-            tokens: Mutex::new(HashMap::new()),
+            tokens: Mutex::new(tokens),
+            storage,
         }
     }
 }
@@ -138,7 +143,8 @@ pub async fn login(
     {
         let token = Uuid::new_v4().to_string();
         let mut tokens = state.tokens.lock().await;
-        tokens.insert(token.clone(), req.username);
+        tokens.insert(token.clone(), req.username.clone());
+        state.storage.save_tokens(&tokens);
 
         return items::LoginResponse {
             token,
@@ -163,6 +169,7 @@ pub async fn logout(
     let mut tokens = state.tokens.lock().await;
 
     if tokens.remove(&req.token).is_some() {
+        state.storage.save_tokens(&tokens);
         items::LogoutResponse {
             success: true,
             message: "Logged out successfully".to_string(),