IdAccessCases.swift

case let id as Identifier:
    guard let user = try User.find(id.id) else {
        throw Abort.custom(status: .forbidden, message: "Invalid user identifier.")
    }
            
    return user
case let accessToken as AccessToken:
     guard let user = try User.query().filter("access_token", accessToken.string).first() else {
         throw Abort.custom(status: .forbidden, message: "Invalid access token.")
     }
            
     return user