Request event interface error 401 to access in application mode

[1914709715]

I am using Java to make calls using HTTPS

Here is the code I have written

public static void main(String[] args) throws Exception { try{ app = ConfidentialClientApplication.builder( clientId, ClientCredentialFactory.createFromSecret(secret)) .authority(authority) .build(); IAuthenticationResult result = getAccessTokenByClientCredentialGrant(); // String usersListFromGraph = getUsersListFromGraph(result.accessToken()); String hy= createHy(result.accessToken()); System.out.println("hy in the Tenant = " + hy); //System.out.println("Users in the Tenant = " + usersListFromGraph); System.out.println("Press any key to exit ..."); System.in.read(); }catch (Exception e){ throw e; } }

private static IAuthenticationResult getAccessTokenByClientCredentialGrant() throws Exception { // With client credentials flows the scope is ALWAYS of the shape "resource/.default", as the // application permissions need to be set statically (in the portal), and then granted by a tenant administrator ClientCredentialParameters clientCredentialParam = ClientCredentialParameters.builder( Collections.singleton(scope)) .build(); CompletableFuture future = app.acquireToken(clientCredentialParam); return future.get(); }

public static String createHy(String accessToken) throws IOException { String json="{"name": "Volunteer"}"; String urlPath = "https://graph.microsoft.com/v1.0/users/2af28489-0593-4fc6-97a1-d1df4c681f01/calendars"; URL url = new URL(urlPath); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST"); conn.setRequestProperty("Authorization", "Bearer " + accessToken); conn.setRequestProperty("Content-type","application/json"); conn.setDoOutput(true); try (OutputStream os = conn.getOutputStream()) { byte[] input = json.getBytes("utf-8"); os.write(input, 0, input.length); } try (BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"))) { String responseLine; StringBuilder response = new StringBuilder(); while ((responseLine = br.readLine()) != null) { response.append(responseLine.trim()); } System.out.println("Response: " + response.toString()); return response.toString(); } }

Image is no longer available.

Is it because there was a problem with obtaining my token that I have been granted the correct permissions but still reported 401 when creating a calendar