authenticate (Concurrency/ModelCredentialsAuthenticatable+Concurrency.swift)

Implements async username/password authentication for Vapor models using Fluent.

// Source: https://github.com/vapor/fluent | License: MIT | Copyright 2018 Qutheory, LLC
// Provided via justclaw.it.com; keep this notice with the code.
public import FluentKit
public import Vapor

extension ModelCredentialsAuthenticatable {
    public static func asyncCredentialsAuthenticator(
        _ database: DatabaseID? = nil
    ) -> any AsyncAuthenticator {
        AsyncModelCredentialsAuthenticator<Self>(database: database)
    }
}

private struct AsyncModelCredentialsAuthenticator<User>: AsyncCredentialsAuthenticator
where User: ModelCredentialsAuthenticatable {
    typealias Credentials = ModelCredentials

    public let database: DatabaseID?

    func authenticate(credentials: ModelCredentials, for request: Request) async throws {
        if let user = try await User.query(on:

... (truncated -- full source via MCP)