docs: def login(self, **params):
          """
          **login**
  
          Use the current credentials to get a valid Gett access token.
  
          Input:
              * A dict of parameters to use for the login attempt (optional)
  
          Output:
              * ``True``
  
          Example::
  
              if client.user.login():
                  print "You have %s bytes of storage remaining." % ( client.user.storage_limit - client_user.storage_used )
          """
  
          if not params:
              params = {
                  "apikey": self.apikey,
                  "email": self.email,
                  "password": self.password
              }
  
          response = GettRequest().post("/users/login", params)
  
          if response.http_status == 200:
              self._access_token = response.response['accesstoken']
              self.refresh_token = response.response['refreshtoken']
              self.access_token_expires = int(time()) + response.response['expires']
              self.userid = response.response['user']['userid']
              self.fullname = response.response['user']['fullname']
              self.storage_used = response.response['user']['storage']['used']
              self.storage_limit = response.response['user']['storage']['limit']
  
              return True