delete customer 401 Unauthorized about mailjet-apiv3-java

[lrkwz]

As a workaround I used the GDPR delete feature as described in the user guide :

   @Test
    public void removeContactByID() throws IOException {
        final String randomName = generateRandomUsername();
        final int contactID = addContact(randomName, randomName + "@example.com");

        final String base64Credentials = Base64.getEncoder().encodeToString((API_KEY + ":" + API_SECRET_KEY).getBytes());

        final Request request = new Request.Builder()
                .url("https://api.mailjet.com/v4/contacts/" + contactID)
                .addHeader("authorization", "Basic " + base64Credentials)
                .addHeader("user-agent", "curl/7.54.1") // !!!!
                .delete()
                .build();
        final OkHttpClient httpClient = new OkHttpClient();
        try (final Response response = httpClient.newCall(request).execute()) {
            assertThat(response.isSuccessful()).isTrue();
        }
    }

Contact details are immediately anonymized and all records will be deleted after 30 days. (...) The anonymized contact will retain its contact ID and general configuration settings until it is removed when the 30-day period ends.

So it is useless to test if the deletion has really run after the call.