code: def convert_user_pars(wcspars):
      
      default_pars = default_user_wcs.copy()
      for kw in user_hstwcs_pars:
          default_pars[user_hstwcs_pars[kw]] = wcspars[kw]
      return default_pars
docs: Convert the parameters provided by the configObj into the corresponding
          parameters from an HSTWCS object