I would like to use the API's capabilities to send an attachment. After reading the documentation you have to have a page token to use it. Is there a workaround to this? Different approach? I am relatively new to this area so I will appreciate any comments
Sadly, I do not think this is possible. Facebook states that this is a requirement in their documentation page.
A Facebook Page will be used as the identity of your Messenger experience. When people chat with your app, they will see the Page name and the Page profile picture. To create a new Page, visit https://www.facebook.com/pages/create
Additionally, you will also need to make a facebook account by providing your mobile phone number or credit card. I recommend that you follow this thread as well.