I am using the module user yii whose code is in this link , but in my database I also have a client table.
Is it possible to use the login of the user module to authenticate the client or do I have to create another login for the client? Or can I relate the client table to the module's user table?
You can do this, however you will have to create the model and adapt the login functions to get the new model with your rules.
I still think it would be more practical to log in from scratch.
You can create both, and put an FK on your client by directing you to the extension login.
It's not very nice to create a 1 to 1 relationship, but it solves your problems. When the user logs in, there will be only one client that has that user id, so you know which client is logged in.
The best solution would be to refactor to use only one login, you could use the RBAC to set the access rules for each Profile / Login as well. By doing this, you will have less work if the project you are working on is scalable.
