code: def create(self, data={}, store=None):
          
          _store = store or self.store
          _data = self._build_opr_data(data, _store) if data else self._opr_data
          return self._process('opr/create', _data)
docs: Initiazes an OPR
  
          First step in the OPR process is to create the OPR request.
          Returns the OPR token