pub async fn endpoint_url_provider_with_origin(
    provider_config: &ProviderConfig,
) -> (Option<String>, Origin)Expand description
Load the value for an endpoint URL
This checks the following sources:
- The environment variable 
AWS_ENDPOINT_URL=http://localhost - The profile key 
endpoint_url=http://localhost 
If invalid values are found, the provider will return None and an error will be logged.