docs: func (o *Operation) GetSigner() string {
  	buf := bytes.NewBuffer(nil)
  
  	switch o.AuthType {
  	case "none":
  		o.API.AddSDKImport("aws/credentials")
  
  		buf.WriteString("req.Config.Credentials = credentials.AnonymousCredentials")
  	case "v4-unsigned-body":
  		o.API.AddSDKImport("aws/signer/v4")
  
  		buf.WriteString("req.Handlers.Sign.Remove(v4.SignRequestHandler)\n")
  		buf.WriteString("handler := v4.BuildNamedHandler(\"v4.CustomSignerHandler\", v4.WithUnsignedPayload)\n")
  		buf.WriteString("req.Handlers.Sign.PushFrontNamed(handler)")
  	}
  
  	buf.WriteString("\n")
  	return buf.String()
  }