I made a web service for a Connector that returned:

return response.status(200).json({
    user: {
        'id': '647978c5-01a0-49b8-8f4f-daab25e7ce63',
        'password': 'password',
        'active': true
    }
});

FusionAuth System Event Log said I hadn't given it a unique id, which is not true:

Generic Connector Debug Log for [Test] with Id [b9a215ed-3078-4339-9638-62416fd20837].

3/20/2024 01:58:58 PM Z Attempting authentication request to application with Id [e9fdb985-9173-4e01-9d73-ac2d60d1dc8e] from IP address [172.27.0.1] for [myemailaddress+frontegguserc@simplelogin.com] against the URL [http://host.docker.internal:6252].
3/20/2024 01:59:00 PM Z Endpoint returned status code [200].
3/20/2024 01:59:00 PM Z Connector User:
{
  "active" : true,
  "connectorId" : "e3306678-a53a-4964-9040-1c96f36dda72",
  "data" : {
    "hi" : "hi!"
  },
  "id" : "647978c5-01a0-49b8-8f4f-daab25e7ce63",
  "memberships" : [ ],
  "passwordChangeRequired" : false,
  "preferredLanguages" : [ ],
  "registrations" : [ ],
  "twoFactor" : {
    "methods" : [ ],
    "recoveryCodes" : [ ]
  },
  "usernameStatus" : "ACTIVE",
  "verified" : false
}
3/20/2024 01:59:00 PM Z 
. WARNING DISCARDING USER Connector because it was missing a unique id in the [user.id] or enough information to store in FusionAuth (i.e. an email or username).

If I changed my service to instead return the below, the Connector works and logs me in.

return response.status(200).json({
    user: {
        'id': '647978c5-01a0-49b8-8f4f-daab25e7ce63',
        'password': 'password',
        'active': true,
        'email': email,
        'username': email
    }
});

Either a Connector should work with only a UUID, or the code and docs should change to say it requires email and username too.