code: def http_basic(r, username, password):
      
      username = str(username)
      password = str(password)
  
      auth_s = b64encode('%s:%s' % (username, password))
      r.headers['Authorization'] = ('Basic %s' % auth_s)
  
      return r
docs: Attaches HTTP Basic Authentication to the given Request object.
      Arguments should be considered non-positional.