The call to retrieve stream thumbnail fails with 401 - Invalid OAuth token

[commandercool]

I believe that to be able to access twitch api you need to get a temporary token using client id and secret of your application, please see: https://dev.twitch.tv/docs/authentication/getting-tokens-oauth#oauth-client-credentials-flow .

I've tried to do so using CLIENT_ID_API and hardcoded OAUTH_TOKEN, with no luck though (I receive invalid client secret error message).

If thumbnail retrieval block is commented out - the rest is working as expected.

[commandercool]

Actually, it looks like no API call is necessary anymore. The following works for me:

final String THUMBNAIL_URL = "https://static-cdn.jtvnw.net/previews-ttv/live_user_%s-440x248.jpg";
thumbnailUrl: String.format(THUMBNAIL_URL, channelName.toLowerCase())