[C++] How can I configure s3 filestystem to use my endpoint?

[Алексей Рябов]

Hello, I want to understand the proper way of configuring S3FileSystem for
it to be able reading from my local MinioServer. Question is about
specifying endpoint_url.

I can set access keys through environment
variables AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, but the only way to
specify endpoint url is to set it in bucket location uri through endpoint:

s3://mvp/foo/bar/?endpoint_override=localhost:9000&scheme=http

and then using arrow::fs::FileSystemFromUri method.

Is there any other way of specifying endpoint url similar to access keys?
Please advise.