I wrote about this in 2018 , they deprecated long time ago.

How To Get an FCM Device Token in Android (Updated for 2021)
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Nishchal Raj
Danish Amjad
·Follow
Jun 28, 2021
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I wrote about this in 2018 , they deprecated long time ago.
check my article about this.
https://medium.com/android-news/new-way-to-implement-firebase-push-notification-firebaseinstanceidservice-deprecated-android-b482ad258241
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Written by Danish Amjad1.3K Followers
·260 Following
Senior Mobile Engineer (Android). Open Source Contributor, Technical Writer, ✉️ Dani.amjad12@gmail.com 🔗 https://danishamjad12.github.io
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