AOT Spring authorization server authentication

[trcoelho]

Describe the bug
By compiling natively spring-boot-starter-security-oauth2-authorization-server and then authenticate in oauth2/token, application throws:

Caused by: tools.jackson.databind.exc.InvalidTypeIdException: Could not resolve type id 'java.util.Collections$UnmodifiableMap' as a subtype of `java.util.Map<java.lang.String,java.lang.Object>`: Configured `PolymorphicTypeValidator` (of type `tools.jackson.databind.jsontype.BasicPolymorphicTypeValidator`) denied resolution at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); byte offset: #UNKNOWN]
I could see that it is related to "client_settings" and "token_settings" oauth2_registered_client's columns where JsonMapper.readValue are not able to read ´java.util.Collections$UnmodifiableMap´.

Tried to register type ´java.utils.Collections.class´ hint but no success.

It only occurs when compile natively.

To Reproduce
Spring Boot Version: 4.0.3
Spring Cloud Version: 2025.1.0

Dependency:
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security-oauth2-authorization-server</artifactId> </dependency>

Create a oauth2_registered_client with client_settings and token_settings.
Compile natively with GraalVM.
Try to authenticate.

Expected behavior
Token must be successfully retrieved.