Yes I will, actually I have a users table with very similar colums, what I will do is I will add the rest to qa_users table, like date of birth, biography avatar, name, last name, and some others. To me is easier to change all the variables in my current code since I know pretty well where those are, integrate all the tables, like friend, followers, posts, etc. to Q2A structure and then understand Q2A little by little. Since understanding Q2A will take me a while. But I insist on creating my own login so I can use my form and integrate the social media logins that I already worked on.
Final thing is that I saw the above script works, but funny thing only when I include the variable $_SESSION in the theme that I am working on. Then I can logout etc.But there are many things that I ignore or I don´t understand and those thing make me uncomfortable like how sessioncode helps you to revalidate your user everytime you change pages or refresh.