pub fn with_default_configuration<F>(file_path: F) -> ProfileProvider
    where
        F: Into<PathBuf>,
    {
        ProfileProvider::with_configuration(file_path, ProfileProvider::default_profile_name())
    }
Create a new `ProfileProvider` for the credentials file at the given path, using
the profile name from environment variable ```AWS_PROFILE``` or fall-back to ```"default"```
if ```AWS_PROFILE``` is not set.
rusoto/credential/src/profile.rs