Sign in

Cask Film and Cask Flow share one account, one credit balance and one sign-in. You sign in once per Mac, in whichever app you open first.

You need:

• Cask Film or Cask Flow installed.
• An email address, or a Google account.

Steps

1. Open the app. With no session it shows the sign-in screen.
2. Click Continue with Google, or fill in Email and Password and click Sign in.
3. To make a new account instead, switch to Create account first, then fill in the same fields.

Result

The app leaves the sign-in screen for its project list. The other app picks the session up the next time it launches, with no second sign-in.

One session, both apps

Both apps read and write the same keychain items, in the access group studio.cask.shared under the service name Cask Auth. That has three consequences:

• Signing in on one app signs you in on the other, from its next launch.
• Signing out on one app signs you out of the other. The sign-out deletes the shared items and the backend revokes the token, so the other app’s next refresh fails and it returns to the sign-in screen.
• The two apps refresh the same token independently. A refresh that lands within seconds of the other app’s is treated as a race rather than as a stolen token, so neither app is logged out for it.

Each app still identifies itself to the backend separately, so your device list and your sessions record which app did what.

If it doesn’t work

Symptom	Cause	Fix
Sign-in fails with a password you are sure of	Wrong account, or the password was reset	Use Forgot password? on the sign-in screen
You are signed in on one app and not the other	The other app was already running when you signed in	Quit and reopen it
Both apps return to the sign-in screen at once	You signed out in one of them, which revokes the shared session	Sign in again in either app
Cask Film shows Limited availability after sign-in	The account is on the waitlist and has not been granted access	Wait for the email. Sign in with a different account switches accounts