title: What is the length of the access_token in Facebook OAuth2?
body: <p>I searched on Google and StackOverflow to find a answer to my question but I can't find one.</p>
  
  <p>I'd like to store the access_token to my database for offline access and I'd like to be sure to specify the correct length of my column.</p>
  
  <p>I can't even find if it's just a number or a mix between number and strings.</p>