code: def grant_user_access(self, user, db_names, strict=True):
          
          user = utils.get_name(user)
          uri = "/%s/%s/databases" % (self.uri_base, user)
          db_names = self._get_db_names(db_names, strict=strict)
          dbs = [{"name": db_name} for db_name in db_names]
          body = {"databases": dbs}
          try:
              resp, resp_body = self.api.method_put(uri, body=body)
          except exc.NotFound as e:
              raise exc.NoSuchDatabaseUser("User '%s' does not exist." % user)
docs: Gives access to the databases listed in `db_names` to the user. You may
          pass in either a single db or a list of dbs.
  
          If any of the databases do not exist, a NoSuchDatabase exception will
          be raised, unless you specify `strict=False` in the call.