code: def get_common_password_hash(self, salt):
          
          password = self._password
          if password is None:
              raise SRPException('User password should be in context for this scenario.')
  
          return self.hash(salt, self.hash(self._user, password, joiner=':'))
docs: x = H(s | H(I | ":" | P))
  
          :param int salt:
          :rtype: int