Fb.api me email undefined

A classic Facebook API error!

The error fb.api me email undefined typically occurs when you're trying to access the email address of the currently logged-in user using the Facebook API, but the email address is not available or not defined.

Here are a few possible reasons for this error:

1. Email address not provided: When a user creates a Facebook account, they may not provide an email address. In this case, the email field will be undefined.
2. Email address not public: Even if a user has provided an email address, they may have chosen to keep it private. In this case, the email field will be undefined for your app.
3. Facebook API permissions: Make sure that your app has the necessary permissions to access the user's email address. You need to request the email permission in your app's settings and also include it in your API request.

To fix this error, you can try the following:

1. Check the user's email address in the Facebook Graph API Explorer to see if it's available.
2. Verify that your app has the necessary permissions to access the user's email address.
3. Use the fields parameter in your API request to specify which fields you want to retrieve, including the email field. For example:

   fb.api('/me', { fields: 'email' }, function(response) {
   console.log(response.email);
   });

4. If the user's email address is not available, you can consider using alternative authentication methods or asking the user to provide their email address explicitly.