<Why I am not able to link Multiple Auth Providers...

# stackoverflow

[user]

Why I am not able to link Multiple Auth Providers to an Firebase Account on Android Jetpack compose?
I have sign in project in jetpack project so, I want to use phone authentication also in my project, so when I complete my process, in firebase providers section, my email and phone number not link, I read example question, and I added this line of code in my project
val credential = PhoneAuthProvider.getCredential(verificationOtp, otp)
auth.currentUser?.linkWithCredential(credential)...