[SOLVED] org.springframework.web.client.RestClientException: No HttpMessageConverter for java.util.HashMap and content type "multipart/form-data"

Error added: 2022-08-29T09:24:48Z

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Answer 2718 (100.0% helpful)

		HttpHeaders headers = new HttpHeaders();

		MultiValueMap<String, Object> map = new LinkedMultiValueMap<>();
		map.put("username", Collections.singletonList(username));
		map.put("password", Collections.singletonList(password));
		HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(map, headers);

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