[richardknop]

Just in addition to my answer above, yes there is a way to log in in my project. See the README which showcases the built in web forms.

The database contains a simple table to store usernames and passwords for resource owner credentials grant.

There is no API for registering a new user account though which is what I meant.

You can do that manually buy running SQL statement to insert new username and password, or by using the cli and load it from fixtures.

How you handle registering user accounts, updating user data, resetting passwords, all of that I wanted to leave open to implementation as there are various ways in which this can be done and other people might prefer one over another so I didn't want to prescribe a specific way to do it.

I offer my preferred implementation using JSON HAL in my extending project I mentioned above. If anybody is interested, they can still fork my example-api and customize that.