Check that a data frame sent to this function has a valid structure for student submitted quiz

This function takes the data frame or tibble that is supposed to contain a valid quiz submission and checks that structure and content are valid

check_submission(quizdf, quizid)

Arguments

quizdf: Data frame of quiz that needs to be checked
quizid: ID of quiz based on file name, needs to match quizid column entry in spreadsheet

An error message if it's not a valid quiz data frame, otherwise NULL