fix(copilot): refresh token before sending the request (#791)

Co-authored-by: Aaron Pham <contact@aarnphm.xyz>

lua/avante/providers/copilot.lua

@@ -91,7 +91,7 @@ H.refresh_token = function()
     not M.state.github_token
     or (M.state.github_token.expires_at and M.state.github_token.expires_at < math.floor(os.time()))
   then
-    curl.get(H.chat_auth_url, {
+    local response = curl.get(H.chat_auth_url, {
       headers = {
         ["Authorization"] = "token " .. M.state.oauth_token,
         ["Accept"] = "application/json",
@@ -99,14 +99,16 @@ H.refresh_token = function()
       timeout = Config.copilot.timeout,
       proxy = Config.copilot.proxy,
       insecure = Config.copilot.allow_insecure,
-      on_error = function(err) error("Failed to get response: " .. vim.inspect(err)) end,
+    })
-      callback = function(output)
+
-        M.state.github_token = vim.json.decode(output.body)
+    if response.status == 200 then
+      M.state.github_token = vim.json.decode(response.body)
       local file = Path:new(copilot_path)
       file:write(vim.json.encode(M.state.github_token), "w")
       if not vim.g.avante_login then vim.g.avante_login = true end
-      end,
+    else
-    })
+      error("Failed to get success response: " .. vim.inspect(response))
+    end
   end
 end
 
@@ -168,7 +170,8 @@ M.setup = function()
       oauth_token = H.get_oauth_token(),
     }
   end
-  H.refresh_token()
+
+  vim.schedule(function() H.refresh_token() end)
 
   require("avante.tokenizers").setup(M.tokenizer_id)
   vim.g.avante_login = true