Refactor users management

* Shard `src/data/user.rs` into two different files
  * One for user data structure (same file)
  * One for user manipulation (new file: `user_file_entity.rs`)
* Isolate password hashing and verification

src/main.rs

@@ -20,7 +20,7 @@ use basic_oidc::data::app_config::AppConfig;
 use basic_oidc::data::client::ClientManager;
 use basic_oidc::data::entity_manager::EntityManager;
 use basic_oidc::data::jwt_signer::JWTSigner;
-use basic_oidc::data::user::{hash_password, User};
+use basic_oidc::data::user::User;
 use basic_oidc::data::webauthn_manager::WebAuthManager;
 use basic_oidc::middlewares::auth_middleware::AuthMiddleware;
 
@@ -51,16 +51,17 @@ async fn main() -> std::io::Result<()> {
         log::info!("Create default {} user", DEFAULT_ADMIN_USERNAME);
         let default_admin = User {
             username: DEFAULT_ADMIN_USERNAME.to_string(),
-            password: hash_password(DEFAULT_ADMIN_PASSWORD).unwrap(),
-            need_reset_password: true,
             authorized_clients: None,
             admin: true,
             ..Default::default()
         };
 
         users
-            .insert(default_admin)
+            .insert(default_admin.clone())
             .expect("Failed to create initial user!");
+
+        // Set default admin password
+        users.change_user_password(&default_admin.uid, DEFAULT_ADMIN_PASSWORD, true);
     }
 
     let users_actor = UsersActor::new(users).start();