AWS S3 region identifier, passing in custom values is also possible, in that case it is up to you to pass a valid endpoint, otherwise boom will happen :)

Example

```rust use std::str::FromStr; use awsregion::Region;

// Parse from a string let region: Region = "us-east-1".parse().unwrap(); // Choose region directly let region = Region::EuWest2;

// Custom region requires valid region name and endpoint let regionname = "nl-ams".tostring(); let endpoint = "https://s3.nl-ams.scw.cloud".tostring(); let region = Region::Custom { region: regionname, endpoint }; ```