diff --git a/src/main/main.ts b/src/main/main.ts
index 09f28f6..1d4f6ee 100644
--- a/src/main/main.ts
+++ b/src/main/main.ts
@@ -79,6 +79,14 @@ type SessionRecord = {
   updatedAt: number;
 };
 
+type SessionRequestResult =
+  | { ok: true; sessionId: string; url: string }
+  | { ok: false; error: string; url: string };
+
+type SessionLookupResult =
+  | { ok: true; sessionId: string; url: string; source: "cache" | "login" }
+  | { ok: false; error: string; url: string };
+
 type InstallStep = {
   name: string;
   result: CommandRunResult;
@@ -936,7 +944,7 @@ const postText = async (path: string, body: unknown) => {
   });
 };
 
-const requestSessionId = async (username: string) => {
+const requestSessionId = async (username: string): Promise<SessionRequestResult> => {
   const loginResult = await postText("/launcher/profile/login", { username });
   if (!loginResult.ok) {
     return { ok: false, error: loginResult.error ?? "login_failed", url: loginResult.url };
@@ -952,7 +960,7 @@ const requestSessionId = async (username: string) => {
 
 const isSessionInvalidStatus = (status?: number) => status === 401 || status === 403;
 
-const getSessionIdForUser = async (username: string) => {
+const getSessionIdForUser = async (username: string): Promise<SessionLookupResult> => {
   const cached = await readSessionRecord();
   if (cached && cached.username === username && !isSessionExpired(cached)) {
     await refreshSessionRecord({ username: cached.username, sessionId: cached.sessionId });