Does a member no longer have an active product, or do you want to block app access for another reason? Disable their app access. The member remains in your member list with all data and history.
Disabling app access
Go to Members and open the member.
Stay on the tab General.
In the block Profile & contact scroll to the row App access. It currently says Access allowed.
Click the row App access. A selection menu opens.
Choose the option to revoke access and confirm.
From that point, the member can no longer log in to the app.
Good to know
Products and credits: disabling app access does not stop a membership or change invoices or credits. Want to end a membership too? Do that separately through the tab Finance.
Re-enabling access: click the row again App access and choose to allow access again. The member can then log in with their existing details.