Not be able to fetch data based on custom dimensions - google-analytics

Question

Custom dimension
`public class GetUsersData {
private static final String APPLICATION_NAME = "Wtr-web";
private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
private static final String KEY_FILE_LOCATION = "D:\\ga3\\credentials.json";
// private static final String USER_VIEW_ID = "281667139"; // userIdView
private static final String CLIENT_VIEW_ID = "281540591"; // all page
// private static Map<String, String> convertedUserMap = new LinkedHashMap<>();
public UsersData getUsersData() throws Exception {
// Create the DateRange object.
DateRange dateRange = new DateRange();
dateRange.setStartDate("30DaysAgo");
dateRange.setEndDate("today");
return getStatistics(initializeAnalyticsReporting(), dateRange, CLIENT_VIEW_ID);
}
private AnalyticsReporting initializeAnalyticsReporting() throws GeneralSecurityException, Exception {
HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
GoogleCredential credential = GoogleCredential.fromStream(new FileInputStream(KEY_FILE_LOCATION))
.createScoped(Collections.singletonList(AnalyticsReportingScopes.ANALYTICS_READONLY));
// Construct the Analytics Reporting service object.
return new AnalyticsReporting.Builder(httpTransport, JSON_FACTORY, credential)
.setApplicationName(APPLICATION_NAME).build();
}
private UsersData getStatistics(AnalyticsReporting service, DateRange dateRange, String userViewId) {
// Create the Metrics object.
Metric visits = new Metric().setExpression("ga:visits");
Dimension UserId = new Dimension().setName("ga:UserID");
// Create the ReportRequest object.
ReportRequest request = new ReportRequest().setViewId(userViewId).setDateRanges(Arrays.asList(dateRange))
.setMetrics(Arrays.asList(visits))
.setDimensions(Arrays.asList(UserId));
// Create the GetReportsRequest object.
GetReportsRequest getReport = new GetReportsRequest().setReportRequests(Arrays.asList(request));
GetReportsResponse response = null;
try {
response = service.reports().batchGet(getReport).execute();
} catch (Exception e) {
e.printStackTrace();
System.out.println(" data not found");
}
if (response != null) {
for (Report report : response.getReports()) {
ColumnHeader columnHeader = report.getColumnHeader();
ClassInfo classInfo = report.getClassInfo();
List<ReportRow> rows = report.getData().getRows();
if (rows == null) {
System.out.println("No data found for the request.");
}
for (ReportRow row : rows) {
List<String> dimensions = row.getDimensions();
List<DateRangeValues> metrics = row.getMetrics();
}
}
}
return new UsersData();
}
}`
com.google.api.client.googleapis.json.GoogleJsonResponseException: 400 Bad Request
POST https://analyticsreporting.googleapis.com/v4/reports:batchGet
{
"code" : 400,
"errors" : [ {
"domain" : "global",
"message" : "Unknown dimension(s): ga:UserID\nFor details see https://developers.google.com/analytics/devguides/reporting/core/dimsmets.",
"reason" : "badRequest"
} ],
"message" : "Unknown dimension(s): ga:UserID\nFor details see https://developers.google.com/analytics/devguides/reporting/core/dimsmets.",
"status" : "INVALID_ARGUMENT"
}
UserID is my custom dimension. how can i resolve this issue.