step 1: clone and download rep
step 2: change directory to project location
step 3: run npm install
step 4: open server.js file and uncomment the code
step 5: run "node server.js"(it will create the mongoDb: "tester" collection: "userdatas" with smaple data automatically)
step 6: again open "server.js"
step 7: comment the same line which you have uncommented in step 5
step 8: save the file and resart the server
setp 9: enter id as "14it019" and password as "snsct2018", see the result in console
step 10: enter id as "14it019" and password as "abcdefghi", see the result