so i am trying out the basic Hello bot with Slack but all i keep getting after the start_link/3 is:
** (MatchError) no match of right hand side value: {:error, "Slack API returned an error `method_deprecated.\n Response: {\"ok\":false,\"error\":\"method_deprecated\"}"}
so i am trying out the basic Hello bot with Slack but all i keep getting after the start_link/3 is: