refactor: Replace generic AnilistDurableObject fetch endpoint with dedicated methods and update their usage.

src/controllers/auth/anilist/getUser.ts

@@ -6,25 +6,19 @@ export async function getUser(aniListToken: string): Promise<User> {
   const durableObjectId = env.ANILIST_DO.idFromName("GLOBAL");
   const stub = env.ANILIST_DO.get(durableObjectId);
 
-  const response = await stub.fetch("http://anilist-do/graphql", {
-    method: "POST",
-    headers: {
-      "Content-Type": "application/json",
-    },
-    body: JSON.stringify({
-      operationName: "GetUser",
-      variables: { token: aniListToken },
-    }),
-  });
-
-  if (!response.ok) {
-    if (response.status === 401) {
+  let data;
+  try {
+    data = await stub.getUser(aniListToken);
+  } catch (e: any) {
+    if (e.message.includes("401")) {
       return null;
     }
-    throw new Error(`Failed to fetch user: ${response.statusText}`);
+    throw e;
   }
 
-  const data = (await response.json()) as any;
+  if (!data) {
+    return null;
+  }
 
   return {
     ...data,