# Facebook authentication
Visit [Facebook for developers](https://developers.facebook.com/).
Create new project.
Click **Create App** and fill the information for your project.
From the left menu click **Settings** and select **Basic**.
Enter the information for your project.
Next after you finish with this scroll to the bottom, click **Add platform** and select **Website.**
Now enter your website URL.
Next from the left menu in Product section find **Facebook Login** and under select **Settings**.
Find **Valid QAuaht Redirect URIs** and enter your redirect URL.
{% hint style="info" %}
Note: The redirect must be defined like in the picture below.
{% endhint %}
The last step you need to do is to switch the mode of your app from development to live.
Copy **App ID** and **App Secret** and add this values in the .env file.
```
FACEBOOK_CLIENT_ID="" //Used for facebook login
FACEBOOK_CLIENT_SECRET="" //Used for facebook login
FACEBOOK_REDIRECT="" //Used for facebook login
```
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Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://mobidonia.gitbook.io/mresto/define-basics/facebook.md?ask=
```
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The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.