Not breaking MVC architecture anymore. Everything is where it is supposed to.
My PC broke down, backing up everything I have, just in case
Changes in exam Definition queries
Merging changes
Merged Changes
Fixed bug
Users_controller get_users query improved
Query Modified
Users are now correctly added in the selection for Exam Definition
Button Continue Working Properly
Groups are added
Cantake can be set now. Both groups and users are checked for not existance inside the cantakes table before even trying to add them.