wiki-js/client/graph/admin/utilities/utilities-mutation-importv1-users.gql

mutation($mongoDbConnString: String!, $groupMode: SystemImportUsersGroupMode!) {
  system {
    importUsersFromV1(mongoDbConnString: $mongoDbConnString, groupMode: $groupMode) {
      responseResult {
        succeeded
        errorCode
        slug
        message
      }
      usersCount
      groupsCount
      failed {
        provider
        email
        error
      }
    }
  }
}