Creates an API mapping.
See https://www.paws-r-sdk.com/docs/apigatewayv2_create_api_mapping/ for full documentation.
apigatewayv2_create_api_mapping(ApiId, ApiMappingKey = NULL, DomainName, Stage)
[required] The API identifier.
The API mapping key.
[required] The domain name.
[required] The API stage.