oauth-url.swift

public func authorizationURL() -> URL?
{
    var components = URLComponents(string:"https://api.trakt.tv/oauth/authorize")

    let queryItems:[URLQueryItem]=[
        URLQueryItem(name: "response_type", value: "code"),
        URLQueryItem(name: "client_id", value: self.clientID),
        URLQueryItem(name: "redirect_uri", value: self.redirecURL.absoluteString),
        URLQueryItem(name: "state", value: " ")
    ]

    components?.queryItems = queryItems

    return components?.url
}