Feat: works on my machine

cmd.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var RootCmd = &cobra.Command{
+	Use: "game",
+	PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		viper.AutomaticEnv()
+		viper.SetEnvKeyReplacer(strings.NewReplacer("_", "-"))
+		viper.BindPFlags(cmd.PersistentFlags())
+		viper.BindPFlags(cmd.Flags())
+	},
+}
+
+func main() {
+	RootCmd.Execute()
+}
+
+func init() {
+	cobra.EnableTraverseRunHooks = true
+
+	RootCmd.AddCommand(authCmd)
+	RootCmd.AddCommand(playerCmd)
+	RootCmd.AddCommand(testCmd)
+}