mailGonder.kt

private fun mailGonder(){
        var kullanici=FirebaseAuth.getInstance().currentUser
        if (kullanici != null){
            kullanici.sendEmailVerification()
                .addOnCompleteListener(object : OnCompleteListener<Void>{
                    override fun onComplete(p0: Task<Void>) {
                        if(p0.isSuccessful){
                            Toast.makeText(this@RegisterActivity,"Mailinizi kontrol edin, mailinizi onaylayın", Toast.LENGTH_SHORT).show()
                        }else{
                            Toast.makeText(this@RegisterActivity,"Mail gönderilirken sorun oluştu "+p0.exception?.message, Toast.LENGTH_SHORT).show()
                        }
                    }
                })
        }
    }