Unable to push files to Github using Rest API - rest

Question

I am using the below mentioned code to commit a file to github.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class GitHubRestClient {
public static void main(String[] args) {
try {
URL url = new URL("https://api.github.com/repos/userid/test/contents/test/");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("PUT");
conn.setRequestProperty("Accept", "application/vnd.github+json");
conn.setRequestProperty("Authorization", "Bearer ");
conn.setRequestProperty("X-GitHub-Api-Version", "2022-11-28");
conn.setRequestProperty("User-Agent", "Request");
String input = "{\"message\":\"my commit message\",\"committer\":{\"name\":\"Nithin\",\"email\":\"nithin#mail.com\"},\"content\":\"bXkgbmV3IGZpbGUgY29udGVudHM=\"}";
OutputStream os = conn.getOutputStream();
os.write(input.getBytes());
os.flush();
if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseMessage());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
I am getting ** 422 HTTP error code: Unprocessable Entity** error.
Using the same values in the curl command I was able to upload the files