fix: use valid graphql query for gaiia connection test

the viewer query doesn't exist in gaiia's schema, causing a 400
validation error. use a minimal accounts query instead. also handle
400 responses with graphql errors properly.

lib/towerops/gaiia/client.ex

@@ -202,9 +202,9 @@ defmodule Towerops.Gaiia.Client do
 
   # --- Queries ---
 
-  @doc "Test the connection to Gaiia by running a simple viewer query."
+  @doc "Test the connection to Gaiia by fetching a single account."
   def test_connection(api_key, opts \\ []) do
-    case query(api_key, "{ viewer { id } }", %{}, opts) do
+    case query(api_key, "{ accounts(first: 1) { edges { node { id } } } }", %{}, opts) do
       {:ok, _data} -> {:ok, %{}}
       {:error, reason} -> {:error, reason}
     end
@@ -239,6 +239,9 @@ defmodule Towerops.Gaiia.Client do
       {:ok, %{status: status, body: %{"errors" => errors}}} when status in 200..299 ->
         {:error, {:graphql_errors, errors}}
 
+      {:ok, %{status: 400, body: %{"errors" => errors}}} ->
+        {:error, {:graphql_errors, errors}}
+
       {:ok, %{status: 401}} ->
         {:error, :unauthorized}
 

test/towerops/gaiia/client_test.exs

@@ -6,7 +6,14 @@ defmodule Towerops.Gaiia.ClientTest do
   describe "test_connection/2" do
     test "returns ok on successful connection" do
       Req.Test.stub(Client, fn conn ->
-        Req.Test.json(conn, %{"data" => %{"viewer" => %{"id" => "user-1"}}})
+        Req.Test.json(conn, %{
+          "data" => %{
+            "accounts" => %{
+              "edges" => [],
+              "pageInfo" => %{"hasNextPage" => false, "endCursor" => nil}
+            }
+          }
+        })
       end)
 
       assert {:ok, %{}} = Client.test_connection("test-key")