Minor updates and comments

models/idModel.go

@@ -4,6 +4,16 @@ import (
 	"go.mongodb.org/mongo-driver/bson/primitive"
 )
 
+/*
+	This is a stupid Idea but in the cids collection
+	is a list of all id's (student id's [sid], teacher
+	id's [tid], or admin id's [aid]) this way when
+	generating a new id for a new user, only the cids
+	collection has to be searched to see the id is
+	already in use. Rather than looking in the admin,
+	teacher, and student collections to check an id.
+*/
+
 type Id struct {
 	ID  primitive.ObjectID `bson:"_id"`
 	CID string             `bson:"cid"` // custom id for admin, teahcer or student