public protocol AuthenticationRequest 

static func authenticationResponse(
        for user: User,
        on request: Request,
        currentDate: Date = Date()
    ) throws -> AuthenticationResponse<User> 

typealias User = AccessKeychainConfig.JWTPayload.User

associatedtype AccessKeychainConfig: KeychainConfig

associatedtype RefreshKeychainConfig: KeychainConfig
        where RefreshKeychainConfig.JWTPayload.User == User