We need to make a login system for students of our school.
We need to get information from our schools site and display this on our site.
Our school doesn't have an api or other way to log them in, users need to enter their login credentials.
Now I am aware of post & get requests to log the user in ones I got their password but I need to know if there is a SECURE way for my users to only login to my site and that then we will automatically be able to log into the site of our school. We do not have any say in how the school stores passwords. Also, there are multiple people involved so nobody should be able to see any password.