i login threw the new use id and password, example as demo and demo but when i login its not showing the my module which i create in addon_custom so i want know how can i set a group for that so can see the view looks like when i work as admin ,

i created security file ,ir.access.csv file,xml for that which is given below which one of my module student

ir.access.csv :-

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink

demo_admin, student.student,model_studnet_student,student.group_demo,1,1,1,1

demo_group.xml :-

    <record id="group_demo" model="res.groups">

        <field name="name">Personalize student mgmt</field>

        <field name="implied_ids" eval="[(4, ref('base.group_user'))]"/>

        <field name="comment">demo_student</field>

    </record>

so now tell me what chnages i shoud do becuse when i give the group attr to the one of the menu of student_student model is showing external id not found so please explain the what changes i have to do in csv,xml and group attrs value 

thank you in advance