현재 접속 Auth 정보 가져오기

package com.example.mysololife.utils

import com.google.firebase.auth.FirebaseAuth


class FBAuth {
    companion object{

        private lateinit var auth: FirebaseAuth

        fun getUid(): String {
            auth = FirebaseAuth.getInstance()

            return auth.currentUser?.uid.toString()
        }

    }
}