Bubble.io ----- log in / sign up set up

I'm looking to set up a secure login system on Bubble.io, including features like sign up, log in, change password, remember me, and log out if inactive.

I have User database populated. Option Set of roles set up.

I have three types of users: admin, groomers, and clients, each with have different access levels. At the moment all User roles are blank. I can update the groomers and owners quickly. Should Users clients role be left blank and set up a default permissions, or do I need a backend workflow to set them.

Scope of work

- Set up login, sign up, change password, remember me, and log out functionalities.
- Implement security settings and permissions for user access control.
- Configure user role access based on admin, groomers, and clients.
- Create navigation directing admins, groomers, and clients to respective dashboard pages - all set up.
- Provide guidance on limiting access to pages and data based on user roles.

Additional information
Could you advise if a backend workflow is needed for setting roles for existing clients or if leaving the role blank is better?