Why do I get errors when entering my username and password according to what the teacher wrote?

Question

Written the student score g management system according to the teacher's code. Enter the user name and password. What's going on when an error occurs?

Answer 1

I didn’t watch the video.

But there is one thing I hope you can pay attention to.

Next time when you ask a question, be sure to describe the problem. Take screenshots if you can. If not, please post part of the code.

Just raise a mistake, others don't know where you went wrong even if they want to help you.

Just like you said, "An error occurred when entering the user name and password." Is this error a password error or a statement error? How can people who have not watched the video help you? How can people who have forgotten the content of the video help you? Do you want to watch it again? ? ?

I say all this to remind you who are asking questions to know how to get help.

Answer 2

You print out the password in the database and compare it with the output password