GitLab API `400 Bad Request` response: Bad Request - php

Question

I am working on GitLab API to commit an mp3 file and it was working for years without having problems and the last few weeks it is throwing errors
GuzzleHttp\Exception\ClientException: Client error: `POST https://gitlab.com/api/v4/projects/.../repository/commits/` resulted in a `400 Bad Request` response in file vendor/guzzlehttp/guzzle/src/Exception/RequestException.php on line 113
Here is the code I am using,
$client = new Client([
// Base URI is used with relative requests
'base_uri' => 'https://gitlab.com/',
// You can set any number of default request options.
'timeout' => 300,
]);
$files = [
[
'name' => 'branch',
'contents' => 'TEST'
],
[
'name' => 'commit_message',
'contents' => 'Some message'
],
[
'name' => 'actions[][action]',
'contents' => 'update'
],
[
'name' => 'actions[][file_path]',
'contents' => 'gitlab filepath/test.mp3'
],
[
'name' => 'actions[][content]',
'contents' => file_get_contents('localfilepath/test.mp3')
],
];
$response = $client->request('POST', '/api/v4/projects/.../repository/commits/', [
'headers' => [
'PRIVATE-TOKEN' => $TOKEN
],
'multipart' => $files
]);
return $response->getBody()->getContents();
```
Thanks in Advance

Answer 1

create-new-file-in-repository
POST /projects/:id/repository/files/:file_path
curl --request POST --header 'PRIVATE-TOKEN: <your_access_token>' \
--header "Content-Type: application/json" \
--data '{"branch": "master", "author_email": "author#example.com", "author_name": "Firstname Lastname", \
"content": "some content", "commit_message": "create a new file"}' \
"https://gitlab.example.com/api/v4/projects/13083/repository/files/app%2Fproject%2Erb"
Parameters:
file_path (required) - URL encoded full path to new file. Ex. lib%2Fclass%2Erb
branch (required) - Name of the branch
start_branch (optional) - Name of the branch to start the new commit from
encoding (optional) - Change encoding to base64. Default is text.
author_email (optional) - Specify the commit author’s email address
author_name (optional) - Specify the commit author’s name
content (required) - File content
commit_message (required) - Commit message
Although the document shows that the param of "author_email" and "author_name " is optional, but without these two params will report 400 error, plus then works well