Finish route for confirming CCPO user, add function to update user's ccpo perms, and add success flash message to template

atst/utils/context_processors.py

@@ -122,7 +122,4 @@ def portfolio():
 
 
 def atat():
-    return {
-        "permissions": Permissions,
-        "user_can": user_can_view,
-    }
+    return {"permissions": Permissions, "user_can": user_can_view}

atst/utils/flash.py

@@ -30,6 +30,11 @@ MESSAGES = {
         "message_template": "You have successfully deleted {{ user_name }} from {{ application_name }}",
         "category": "success",
     },
+    "ccpo_user_added": {
+        "title_template": translate("flash.success"),
+        "message_template": "You have successfully given {{ user_name }} CCPO permissions.",
+        "category": "success",
+    },
     "environment_added": {
         "title_template": translate("flash.success"),
         "message_template": """