Error 400: redirect_uri_mismatch in Kotlin while using Google Sheets API

Question

I'm trying to integrate GSheets API in one of my APIs.

My usecase is as follows. My API invokes the Gsheet API to read data from a sheet and then there's some logic thereafter.

I've configured redirect uri as http://localhost in Google API console. When I run my application it tries to redirect to a different URI ...redirect_uri=http://localhost:49868/Callback&response_type=code&scope=https://www.googleapis.com/auth/spreadsheets

This is my code

class SheetsServiceUtil @Inject constructor(
        private val googleAuthorizeUtil: GoogleAuthorizeUtil
    ){
        companion object {
            private const val APPLICATION_NAME = "<my_app_name>";
        }
    
        fun getSheetsService() : Sheets {
            val credential : Credential = googleAuthorizeUtil.authorizeClient()
    
            return Sheets.Builder(
                GoogleNetHttpTransport.newTrustedTransport(),
                JacksonFactory.getDefaultInstance(), credential)
                .setApplicationName(APPLICATION_NAME)
                .build()
        }
    }

class GoogleAuthorizeUtil {
        fun authorizeClient() : Credential {
            val filePointer : Reader = File("<my_file_location>.json").bufferedReader()
            val clientSecrets : GoogleClientSecrets = GoogleClientSecrets.load(JacksonFactory.getDefaultInstance(), filePointer)
    
            var scopes = mutableListOf(SheetsScopes.SPREADSHEETS)
    
            val flow : GoogleAuthorizationCodeFlow = GoogleAuthorizationCodeFlow.Builder(
                GoogleNetHttpTransport
                    .newTrustedTransport(), JacksonFactory.getDefaultInstance(), clientSecrets, scopes)
                    .setDataStoreFactory(MemoryDataStoreFactory())
                    .setAccessType("offline").build()
            return AuthorizationCodeInstalledApp(flow, LocalServerReceiver()).authorize("user")
        }
}