Update of the admin view

I updated the admin view in order to show the fields given in the
allgo_user table in the user administration system.
Signed-off-by: Matthieu Berjon <matthieu.berjon@inria.fr>

django/poc/admin.py

 from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+from django.contrib.auth.models import User
 
-# Register your models here.
+from poc.models import AllgoUser
+
+
+# Define an inline admin descriptor for Employee model
+# which acts a bit like a singleton
+class AllgoUserInline(admin.StackedInline):
+    model = AllgoUser
+    can_delete = False
+    verbose_name_plural = 'allgo users'
+
+
+# Define a new User admin
+class UserAdmin(BaseUserAdmin):
+    inlines = (AllgoUserInline, )
+
+
+# Re-register UserAdmin
+admin.site.unregister(User)
+admin.site.register(User, UserAdmin)