use std::sync::Arc;

use async_trait::async_trait;

pub type DynUserService = Arc<dyn UserService + Send + Sync>;

#[async_trait]
pub trait UserService {
    async fn add_user(&self, username: String, password: String) -> anyhow::Result<String>;
    async fn validate_user(
        &self,
        username: String,
        password: String,
    ) -> anyhow::Result<Option<String>>;
}