code: func (c *Client) PushSMS(userIden, deviceIden, phoneNumber, message string) error {
  	data := Ephemeral{
  		Type: "push",
  		Push: EphemeralPush{
  			Type:             "messaging_extension_reply",
  			PackageName:      "com.pushbullet.android",
  			SourceUserIden:   userIden,
  			TargetDeviceIden: deviceIden,
  			ConversationIden: phoneNumber,
  			Message:          message,
  		},
  	}
  	return c.Push("/ephemerals", data)
  }
docs: // PushSMS sends an SMS message with pushbullet