[D] Apis
[D] Authentication
[D] Exceptions
[D] Http
[D] Models
[D] Utils
[F] ApiHelper.php
[F] BearerAuthCredentials.php
[F] ConfigurationDefaults.php
[F] ConfigurationInterface.php
[F] Environment.php
[F] Server.php
[F] SquareClient.php
[F] SquareClientBuilder.php