skip java uuid request/validation if api sends rate limit response

src/lib/server/minecraft.ts

@@ -9,11 +9,16 @@ export class UserNotFoundError extends Error {
 	}
 }
 
+export class RateLimitError extends Error {}
+
 export class ApiError extends Error {}
 
 export async function getJavaUuid(username: string): Promise<string> {
 	const response = await fetch(`https://api.mojang.com/users/profiles/minecraft/${username}`);
 	if (!response.ok) {
+		if (response.status == 429) {
+			throw new RateLimitError();
+		}
 		throw response.status < 500
 			? new UserNotFoundError(username)
 			: new ApiError(`mojang server error (${response.status}): ${await response.text()}`);