If you're not logged into your correct account in the Sessions app (for example, if you just reinstalled it), here are the steps necessary to log back into your account:
1. Launch the Sessions app and select the "Artist Hub" icon in the bottom menu.
2. Expand your Artist Hub by clicking the white arrow. Then, navigate to [Profile] > [Settings].
3. Scroll down to see the "Log in" option and tap it.
4. Log into your correct account by filling in the "Email" and "Password" fields. If you're unsure of your password, tap "Forgot Password?" to request a new one.