add tcgplayer get category api , get category groups api

modules/config/config.go

@@ -32,7 +32,7 @@ type Config struct {
 	TCGPlayer struct {
 		PublicKey  string `yaml:"public_key"`
 		PrivateKey string `yaml:"private_key"`
-	}
+	} `yaml:"tcgplayer"`
 }
 
 var conf *Config