matrix
fun Application.matrixServerServerApiServer(hostname: String, signatureAuthenticationFunction: SignatureAuthenticationFunction, getRoomVersionFunction: GetRoomVersionFunction, eventContentSerializerMappings: EventContentSerializerMappings = DefaultEventContentSerializerMappings, json: Json = createMatrixEventAndDataUnitJson(getRoomVersionFunction, eventContentSerializerMappings), routes: Route.() -> Unit)