code: def get_user_credentials(self):
          
          password = None
          token = None
          (username, remember_me,
           remember_token) = self._get_credentials_from_settings()
          valid_py_os = not (PY2 and sys.platform.startswith('linux'))
          if username and remember_me and valid_py_os:
              # Get password from keyring
              try:
                  password = keyring.get_password('github', username)
              except Exception:
                  # No safe keyring backend
                  if self._show_msgbox:
                      QMessageBox.warning(self.parent_widget,
                                          _('Failed to retrieve password'),
                                          _('It was not possible to retrieve '
                                            'your password. Please introduce '
                                            'it again.'))
          if remember_token and valid_py_os:
              # Get token from keyring
              try:
                  token = keyring.get_password('github', 'token')
              except Exception:
                  # No safe keyring backend
                  if self._show_msgbox:
                      QMessageBox.warning(self.parent_widget,
                                          _('Failed to retrieve token'),
                                          _('It was not possible to retrieve '
                                            'your token. Please introduce it '
                                            'again.'))
  
          if not running_under_pytest():
              credentials = DlgGitHubLogin.login(self.parent_widget, username,
                                              password, token, remember_me,
                                              remember_token)
  
              if (credentials['username'] and credentials['password'] and
                      valid_py_os):
                  self._store_credentials(credentials['username'],
                                          credentials['password'],
                                          credentials['remember'])
                  CONF.set('main', 'report_error/remember_me',
                           credentials['remember'])
  
              if credentials['token'] and valid_py_os:
                  self._store_token(credentials['token'],
                                    credentials['remember_token'])
                  CONF.set('main', 'report_error/remember_token',
                           credentials['remember_token'])
          else:
              return dict(username=username,
                          password=password,
                          token='',
                          remember=remember_me,
                          remember_token=remember_token)
  
          return credentials
docs: Get user credentials with the login dialog.