diff --git a/lua/plugins/copilot.lua b/lua/plugins/copilot.lua
index 8b935e7..49f40bb 100644
--- a/lua/plugins/copilot.lua
+++ b/lua/plugins/copilot.lua
@@ -42,6 +42,43 @@ return {
         },
       }
 
+      -- Copilot considers any response with a user name authenticated, even
+      -- when the server says `NotAuthorized`. That caused completion requests
+      -- to be sent with invalid credentials and produced `[Copilot.lua] table`.
+      -- Only allow suggestions after an explicit successful (`OK`) status.
+      local auth = require 'copilot.auth'
+      local client = require 'copilot.client'
+      local api = require 'copilot.api'
+      local auth_cache = { value = nil, checked_at = 0, checking = false }
+
+      auth.is_authenticated = function(callback)
+        if not client.initialized then
+          return false
+        end
+
+        local now = vim.uv.now()
+        if auth_cache.value ~= nil and now - auth_cache.checked_at < 30 * 1000 then
+          return auth_cache.value
+        end
+
+        local lsp_client = client.get()
+        if not lsp_client or auth_cache.checking then
+          return false
+        end
+
+        auth_cache.checking = true
+        api.check_status(lsp_client, {}, function(err, status)
+          auth_cache.checking = false
+          auth_cache.checked_at = vim.uv.now()
+          auth_cache.value = not err and status and status.status == 'OK' and status.user ~= nil
+          if callback then
+            callback(err)
+          end
+        end)
+
+        return false
+      end
+
       -- Hide Copilot suggestions when the completion menu is open
       -- local cmp_ok, cmp = pcall(require, 'cmp')
       -- if cmp_ok then