Trait UserProvider 

pub trait UserProvider:
    Send
    + Sync
    + 'static {
    type User: Clone + Send + Sync + 'static;

    // Required method
    fn find_by_id(
        &self,
        id: &str,
    ) -> impl Future<Output = Result<Option<Self::User>, Error>> + Send;
}

Trait for loading a user by their session-stored ID.

Implement this on your own type (e.g., a repository struct that holds a DB pool) and register it via app.service(UserProviderService::new(your_impl)).

Required Associated Types

type User: Clone + Send + Sync + 'static

The user type returned by this provider.

Required Methods

fn find_by_id( &self, id: &str, ) -> impl Future<Output = Result<Option<Self::User>, Error>> + Send

Look up a user by their ID (as stored in the session).

Return Ok(None) if the user doesn’t exist. Return Err only for infrastructure failures (DB errors, etc.).

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors