How to set custom Attributes in keycloak JWT? - jwt

Question

I am making a storage provider that federated user from my local database my question I need to set the attributes of my custom user in the returning JWT.
I need to carry the user from customStorageProvider to JWTMapper to map the attributes to JWT

Answer 1

I am making a storage provider that federated user from my local
database my question I need to set the attributes of my custom user in
the returning JWT.
I need to carry the user from customStorageProvider to JWTMapper to
map the attributes to JWT
That can be achieved with protocol mappers; they can map user-related attributes into the token. To create them via Admin Console, go to your realm:
then to clients, and select the client that you will be authenticating against
Afterwards:
(For the OLD Keycloak UI)
go to Mappers
click on:
either Create (right side) to create your mapper
or Add Builtin to add a Keycloak's built-in mapper
(For the NEW Keycloak UI)
go to the tab Client Scopes
click on the client scope <the client ID of your client>-dedicated (e.g., test-dedicated in the picture below)
if you have never created a mapper for this client before, click on:
either Configure a new mapper to create your mapper
or click on Add predefined mapper to add a Keycloak's built-in mapper
if you have already created mappers for this client before, click on Add mapper and select:
either From predefined mappers to create your mapper
By configuration to add a Keycloak's built-in mapper
Those mappers can also be automatically created with the Keycloak Admin REST API. To understand how check this SO answer on "how o create mapper for each user attribute in Keycloak via REST API".