Two ways:
Email + password — Tap the top-right user icon → "Sign in". Enter email + password. If you haven't registered yet, choose "Create account" and get a verification link in your email.
Google account — Same sign-in dialog → "Continue with Google". This takes you to Google's sign-in page and returns you to Taival when done.
Apple and Microsoft sign-in coming soon. iOS users will get the Apple option when it launches.
Forgot password? "Sign in" → "Forgot password?". Enter your email — you'll get a reset link within five minutes. No link? Check spam or contact us.