DeleteUser not found about firebase-authentication-dotnet HOT 5 CLOSED

/// <summary>
/// Deletes the user with a recent Firebase Token.
/// </summary>
/// <param name="token"> Recent Firebase Token. </param>
public static async Task DeleteUser(string firebaseToken)
{
    var googleDeleteUserUrl = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/deleteAccount?key={0}";
    var content = $"{{ \"idToken\": \"{firebaseToken}\" }}";
    var responseData = "N/A";

    try
    {
        var response = await new HttpClient().PostAsync(new Uri(string.Format(googleDeleteUserUrl, [YOUR_FIREBASE_KEY])), new StringContent(content, Encoding.UTF8, "application/json"));
        responseData = await response.Content.ReadAsStringAsync();

        response.EnsureSuccessStatusCode();
    }
    catch (Exception ex)
    {
        throw new FirebaseAuthException(googleDeleteUserUrl, content, responseData, ex, GetFailureReason(responseData));
    }
}