public AzureCompletionsUsage getUsage() {
        return this.usage;
    }
Get the usage property: Usage information for tokens processed and generated as part of this completions
operation.

@return the usage value.
chat2db-server/chat2db-server-web/chat2db-server-web-api/src/main/java/ai/chat2db/server/web/api/controller/ai/azure/model/AzureChatCompletions.java