build a cloud based saas application with signalR and azure function in it

The Task is to create a SaaS solution that meets a business scenario or real-world application closely associated with Cloud Platform and able to demonstrate an understanding of security best practices for SaaS. Key RequirementsUse of Azure Functions or similar (with approval from Lecturer) for at least one type of calculation or processDemonstrate the use of application communication between a web app and one or more cloud services.  Usage of web API / servicesMaintain a shared environment for source code, communication, and other project documents Prototype an online business-to-business ordering solution. Client apps can be websites or phone applications or both. The system will have at least 3 services:o OrderService – Responsible for handling logins, and creating and processing user requests (Orders) for products and/or services.o InventoryService – Responsible for handling maintenance and supply of the products and/or services data and returning queries about the products and/or services including stock levels (how many available) for each product.o AccountingService – Downloads data from OrderService and InventoryService for the production and issuing of Invoices. Handles the billing for the case of a business ordering more of an item than we have in stock. The services need to securely authenticate their server-to-server conversations with each other.