1)Use serviceAccountley.json in crud controller. you will get that by firebase store. 2)Make a file of it in root directory. 3) Run nodemon serve to start the server. 4) Here is POSTMAN api for your convince. https://www.getpostman.com/collections/0a2d9d04551df308d7cf If found any difficulty, feel free to contact me at https://twitter.com/codewithninja