[REQ] set default value "None" to non-requied field of akka-http-server model
Created by: jsoizo
Is your feature request related to a problem? Please describe.
When using akka-http-server generator, non required field of model has no default value.
This makes it necessary to explicitly provide the values of the added non-required fields when they are added to the generated model at the user of the model.
On the other hand, akka-client generator provides the default value, and doesn’t have the same issue. https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/scala-akka-client/model.mustache#L16
Describe the solution you'd like
Add None as default value when the field is required, in imitation of akka-client