POST \auth\reg

###Description Register the user’s email, password, username and role as student or instructor ###Route POST /auth/reg ###Request Body

{
    "email": " … ",
    "password": " … ",
    "fullname": " … ",
    "role": " … "
}

###Response Code 200 on Success 409 when email has already registered ###Response on Success

{
  "token": " … "
}

###Response on 409

{
     "message": {
          "email": "Email is already taken."
     }
}

###Response on Others

{
     "message": {
           "email": "This user does not exist."
      }
}