How exactly do I re-enable (or get another) access token for facebook?

[Big Red Dog]

https://developers.facebook.com/docs/fac...ss-tokens/

Generating Long-Lived User Tokens from Server-Side Long-Lived Tokens

Facebook has an advanced option for obtaining long-lived access tokens for apps that:

Have their own authentication system (using a username/password for example)
Store, on their servers, a Facebook access token for people using it that they send to different clients (browser or native mobile apps)
Make API calls from all of those clients
If your app is set up like this it should use the process described here to obtain an access token from each client to avoid triggering Facebook's automated spam systems. The end result will be that each client will have its own long-lived access token.

At a high level, this is how you can obtain a long-lived token from the client:

Make a call to Facebook's server from your server using a valid and current long-lived token to generate a code. (This assumes you've already obtained a long-lived token via Facebook Login. If the token you're using is invalid or expired, you'll have to obtain a new one by making the person using your app log in again.)
Securely send that code to the client.
The client then exchanges the code for a long-lived token.
The client can use the long-lived token to post stories or query data.