The registration token is not a valid FCM registration token

I trying to send push notification through web APi .net core 7 where I have installed FirebaseAdmin Nuget packages version 2.4.0 and my configuration is

` // Get the current directory and append the relative path to the JSON file
var serviceAccountKeyPath = System.IO.Path.Combine(Environment.CurrentDirectory, "serviceAccountKey.json");
// Initialize the default app
var defaultApp = FirebaseApp.Create(new AppOptions()
{
Credential = GoogleCredential.FromFile(serviceAccountKeyPath),
});`

and I am sending message like below snippet

`var messages = new List();
foreach (var item in tokens.Split(','))
{
string trimmedToken = item.Trim();

// Create a message
var message = new Message
{
Notification = new Notification
{
Title = model.Title,
Body = model.Message,
},
Token = trimmedToken, // The device token of the recipient
};
messages.Add(message);
}

BatchResponse response = default;
try
{
response = await FirebaseMessaging.DefaultInstance.SendAllAsync(messages);

// Check for a successful response
if (response != null)
{
Console.WriteLine("Successfully sent message: " + response);
}
else
{
Console.WriteLine("FCM response is null.");
}
}
catch (FirebaseException ex)
{
Console.WriteLine("Error sending FCM message: " + ex.Message);
Console.WriteLine("Error code: " + ex.ErrorCode);
// Handle the error appropriately
}`

I am getting error saying

**The registration token is not a valid FCM registration token**

But same token I am sending using firebase console it is working fine

### [REQUIRED] Step 2: Describe your environment

* Operating System version: Android 11
* Firebase AdminSDK version: 2.4.0
* Firebase Product: Push Notification
* .NET version: .net core 7
* OS: windows 11

### [REQUIRED] Step 3: Describe the problem

#### Steps to reproduce:
1. Create Xamarin forms application.
2. Setup firebase Push notification plugin and android manifest.
3. Get Token from refresh token if in debug or else token
4. try to send Push Notification using Token.
5. here you will get error

#### Relevant Code:

https://github.com/jitendrajadav/PushNotificationPoC

Start with FirebaseMessaging.DefaultInstance.SendAllAsync in the reported .NET code and inspect the linked PushNotificationPoC reproduction. Compare the token source and Firebase project setup with the reported behavior; done means reproducing the discrepancy and documenting a confirmed cause or fix.

Written by the indexing model from the issue text.