public protocol LoginRequest: AuthenticationRequest, ValidatableRequest 

static func logIn(
        on request: Request,
        errorOnWrongPassword: @escaping @autoclosure () -> Error,
        currentDate: Date = Date()
    ) -> EventLoopFuture<AuthenticationResponse<Model>> 

typealias Model = User

static var hashedPasswordKey: KeyPath<Model, String> 

var password: String 

func logIn(on request: Request) -> EventLoopFuture<Model>