Errror: 'Client error: GET http://api.steampowered.com/ISteamUser/GetPlayerBans/v1?steamids=76**1197**5761299%2C76561197**043**30 resulted in a 400 Bad Request
Stars in IDs = anonymity
I will grant you that there isn't much documentation because really there isn't much more to write about. All the class commands are, as far as I'm concerned, easy enough to understand just by reading them.
I have just updated the readme to reflect the new changes, which I failed to do last time I updated the code to use the newest version of Guzzle (6.1). I have included in the readme how to set your steam key if that was what you are missing.