External login permission cancellation in asp net core

Introduction

ASP.NET is a popular programming language used for building web applications. One common requirement in web applications is the ability to allow users to log in using external such as Google or . However, there may be scenarios you need to cancel the permission granted to an external provider. In this article, we will explore how to cancel external login permissions in ASP.NET Core.

Canceling External Login Permissions

To cancel the permission granted to an external login provider, you need to follow these :

Step 1: Retrieve the External Login

First, you need to retrieve the external login information for the user. This information includes the provider name and the user's identifier provided by the external login provider. You can use the following code snippet to retrieve the external login information:


var info = await _signInManager.GetExternalLoginInfoAsync();

The GetExternalLoginInfoAsync method retrieves the external login information for the currently authenticated user.

Step 2: Revoke the External Login Permission

Once you have the external login information, you can revoke the permission granted to the external login provider. You can use the following code snippet to revoke the permission:


var result = await _userManager.RemoveLoginAsync(user, info.LoginProvider, info.ProviderKey);

The RemoveLoginAsync method removes the external login provider from the user's .

Step 3: Handle the Result

After revoking the external login permission, you need to handle the result. The RemoveLoginAsync method returns a result indicating whether the operation was successful or not. You can use the following code snippet to handle the result:


if (result.Succeeded)
{
    // External login permission revoked 
}
else
{
    // Failed to revoke external login permission
}

Based on the result, you can perform further actions or display appropriate messages to the user.

Conclusion

In this article, we discussed how to cancel external login permissions in ASP.NET Core. We explored the steps involved in revoking the permission granted to an external login provider and handling the result. By following these steps, you can effectively manage external login permissions in your ASP.NET Core web .

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