Declarative User Profile export

[simse07]

Description

The realm export via admin console, should include the defined declarative user profile.

Discussion

#11541

Motivation

The declarative user profile is a really nice feature, but migrating a realm from one stage to another will require more manual effort without this feature.

Details

The UserProfileProvider is correctly exported with declarative-user-profile but the config is empty:

"org.keycloak.userprofile.UserProfileProvider": [
      {
        "id": "88cef18c-bcd8-40d2-9e7d-d257298317f2",
        "providerId": "declarative-user-profile",
        "subComponents": {},
        "config": {}
      }
    ],

I would expect that the config would contain the defined user attributes.

[MartijnPDirekt]

Importing is possible using the below structure as config. I expect the same thing to be there upon export.
I have added an additional validation at the 'email' attribute to be able to see the difference upon importing the realm.

Discovered this solution with the help of #8872

"config": {        
    "config-piece-0" : [ "{\"attributes\":[{\"name\":\"username\",\"displayName\":\"${username}\",\"permissions\":{\"view\":[\"admin\",\"user\"],\"edit\":[\"admin\",\"user\"]},\"validations\":{\"length\":{\"min\":3,\"max\":255},\"username-prohibited-characters\":{},\"up-username-not-idn-homograph\":{}}},{\"name\":\"email\",\"displayName\":\"${email}\",\"permissions\":{\"edit\":[\"admin\",\"user\"],\"view\":[\"admin\",\"user\"]},\"validations\":{\"email\":{},\"length\":{\"max\":255},\"pattern\":{\"pattern\":\"[a-zA-Z0-9!#$%&'*+\/=?^_`{|}~.-]+@example.nl\",\"error-message\":\"Invalid domain selected\"}},\"annotations\":{\"\":\"\"},\"required\":{\"roles\":[\"user\"]},\"group\":null},{\"name\":\"firstName\",\"displayName\":\"${firstName}\",\"required\":{\"roles\":[\"user\"]},\"permissions\":{\"view\":[\"admin\",\"user\"],\"edit\":[\"admin\",\"user\"]},\"validations\":{\"length\":{\"max\":255},\"person-name-prohibited-characters\":{}}},{\"name\":\"lastName\",\"displayName\":\"${lastName}\",\"required\":{\"roles\":[\"user\"]},\"permissions\":{\"view\":[\"admin\",\"user\"],\"edit\":[\"admin\",\"user\"]},\"validations\":{\"length\":{\"max\":255},\"person-name-prohibited-characters\":{}}}]}" ],
    "config-pieces-count" : [ "1" ]
}