Cuba React front end

Hi support,
I am new in cuba, I try to create a new project as example to make experience.
I tried to add front end React following cuba help documentation.
After install React front end and run project Cuba give me the link for open normal project and react project.
When I try to login in react project I have login error.
Can somebody help me to understand where I find react configuration?
What user credential can I use?
Is there a database of react that contain this information?
Thank for help


If you use CUBA 7.2+ you should configure security role for REST scope and assign the role to the user you are using to log-in.