Practice supports the ability to have multiple accounts under the same email address. In some cases, you are the practitioner and client with the same email account.
If this is the case when you log into your account, you'll see the option to pick which user you'd like to sign in as:
How to log out as the practitioner:
Use the app menu as a way to log out of Practice:
How to log out as the client:
Within the portal, use the three-dot menu to log out as a client: