feat: add tests

src/auth.ts

@@ -46,6 +46,6 @@ export function getTokenUID(token: string): string | null {
 	return null;
 }
 
-export function getTokenData(token: string): JWTPayload {
-	return decode(token) as JWTPayload;
+export function getTokenData(token: string): JWTPayload | null {
+	return decode(token) as JWTPayload | null;
 }