Most instruction and code is from this link : https://dotnetcodr.com/2015/07/02/building-a-web-api-2-project-from-scratch-using-owinkatana-net-part-1/
Most instruction and code is from this link : https://dotnetcodr.com/2015/07/02/building-a-web-api-2-project-from-scratch-using-owinkatana-net-part-1/