How to create Authorizer (and client) without doing authorization in Go?

[MaxCCC]

I use javascript (frontend) to do the authorization. Now I want to use Go as backend and use this client to do API calls against the Spotify API.

In this example: https://github.com/zmb3/spotify/blob/master/examples/authenticate/authcode/authenticate.go you do the authentication and stuff in go.

How can I initialize auth without doing the newAuthorization in Go?

client := auth.NewClient(tok)

Currently I have it working but I still need to define the callback URL in the auth section while I would think it's unnecessary in my case:

var (
	auth  = spotify.NewAuthenticator(redirectURI, spotify.ScopeUserReadPrivate)
	ch    = make(chan *spotify.Client)
	state = "abc123"
)

[fabstu]

What happens if you pass an empty string to NewAuthenticator?

By the way, #123 shows how you can pass a pre-initialized http client into this library. You could just initialize yours by creating the client, setting up OAuth2 on it and passing the created http client in.

[kimtore]

Pardon me for necro-ing this issue but I believe this might be useful.
This was solved for my Go client, which uses an oauth2 token coming from a file on disk.
All you need is the oauth2.Token structure with the data. From https://github.com/ambientsound/visp/blob/5d5f7fd9feea2c2bbe82ba1d022fdfd5702c7578/prog/api.go#L29:

token := &oauth2.Token{ ... (fill in token from your Javascript frontend) ... }
httpClient := oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(token))
spotifyClient := spotify.NewClient(httpClient)

[bretanac93]

This issue has been stalling here for quite some time, but anyways can be helpful I just opened this PR #172 that showcases this use case.

[strideynet]

I'm going to go ahead and close as @bretanac93's demo shows this. If this re-occurs, please open a new ticket.