code: func New(cfg *bridge.Config) bridge.Bridger {
  	number := cfg.GetString(cfgNumber)
  	if number == "" {
  		cfg.Log.Fatalf("Missing configuration for WhatsApp bridge: Number")
  	}
  
  	b := &Bwhatsapp{
  		Config: cfg,
  
  		users:       make(map[string]whatsapp.Contact),
  		userAvatars: make(map[string]string),
  	}
  	return b
  }
docs: // New Create a new WhatsApp bridge. This will be called for each [whatsapp.<server>] entry you have in the config file