Setting up a Grower Central login for customers is optional (not every customer may want one). For those who do, each Customer Account can have one or many associated Grower Central Usernames and Passwords.

Please refer to the white paper for detailed instructions on setting up grower central users.

I want to read the white paper (with lots of screenshots) about configuring Grower Central users.

You can review Grower Central User details in the Audit/Admin data export.