Testing automation to verify the imported data?

I am a beginner in testing, My people have asked to automate a part in our project. The Process is we are importing datas(user name, age, purchase..) for different users from excel sheet to our database/website. The website contains login page. The task is I need to verify all the imported data for different users from excel. If I do it manually, I have to login each user and see whether the data imported is correct for the particular user. This task would be easy if I automate.

Any help would be appreciated. Thanks in advance.