// Returns the credentials attached to an OAuth authentication token.
// This method does not require user authentication, but the request must be api-signed.
func CheckToken(client *flickr.FlickrClient, oauthToken string) (*CheckTokenResponse, error) {
client.EndpointUrl = flickr.API_ENDPOINT
client.ClearArgs()
client.Args.Set("method", "flickr.auth.oauth.checkToken")
client.Args.Set("oauth_token", oauthToken)
client.ApiSign()
response := &CheckTokenResponse{}
err := flickr.DoGet(client, response)
return response, err
}