added admin verification for updating and creating functions

models/idModel.go

@@ -0,0 +1,10 @@
+package models
+
+import (
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+type Id struct {
+	ID  primitive.ObjectID `bson:"_id"`
+	CID string             `bson:"cid"` // custom id for admin, teahcer or student
+}