Before you can use the Web API full functional, you need the user to authenticate your Application.
If you want to know more, you can read to the whole auth-process [here](https://developer.spotify.com/web-api/authorization-guide/).
Before you start, install `SpotifyAPI.Web.Auth` and create an application at Spotify: [Your Applications](https://developer.spotify.com/my-applications/#!/applications)
After you created your Application, you will have following important values:
| **Client_Id** | This is your client_id, you don't have to hide it|
| **Client_Secret** | Never use this in one of your client-side apps! Keep it secret! |
| **Redirect URIs** | Some of auth flows require that you set the correct redirect URI |
Now you can start with the user-authentication, Spotify provides 3 ways (4 if you consider different implementations):
* [ImplicitGrantAuth](/auth/implicit_grant.md)
* [TokenSwapAuth](/auth/token_swap.md) (**Recommended**, server-side code mandatory, most secure method. The necessary code is shown here so you do not have to code it yourself.)