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No converter found capable of converting from type [java.lang.String] to type [com.google.cloud.datastore.Key] error if spring-data-rest is used

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I am using spring-data-rest on top of spring-data-gcp-datastore.

I am trying to explore my resource using HAL browser. Initially it works fine, so I see my elements:

"_embedded": { "configurations": [ "data": "{\n \"test\": \"768\",\n \"test2\": 5\n}", "_links": { "self": { "href": "http://localhost:8083/configurations/Key%7BprojectId=test,%20namespace=,%20path=%5BPathElement%7Bkind=configuration,%20id=null,%20name=k%7D%5D%7D" "configuration": { "href": "http://localhost:8083/configurations/Key%7BprojectId=test,%20namespace=,%20path=%5BPathElement%7Bkind=configuration,%20id=null,%20name=k%7D%5D%7D" "_links": { "self": { "href": "http://localhost:8083/configurations{?page,size,sort}", "templated": true "profile": { "href": "http://localhost:8083/profile/configurations" "page": { "size": 20, "totalElements": 1, "totalPages": 1, "number": 0

But when I try to get one specific resource by following the provided link like http://localhost:8083/configurations/Key%7BprojectId=test,%20namespace=,%20path=%5BPathElement%7Bkind=configuration,%20id=null,%20name=k%7D%5D%7D I got an error: org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.lang.String] to type [com.google.cloud.datastore.Key]

I have tried to create the converters and register them by this way:

@Component
public class WebConfig implements WebMvcConfigurer  {
    @Override
    public void addFormatters(FormatterRegistry registry) {
        System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^^^^");
        registry.addConverter(new KeyToStringConverter());
        registry.addConverter(new StringToKeyConverter());
I see the printout, so the code has been executed, although printouts I have inside converters were not.
I have simple entity:
package com.test.appconfig.datastore.entities;
import lombok.Data;
import com.google.cloud.datastore.Key;
import org.springframework.cloud.gcp.data.datastore.core.mapping.Entity;
import org.springframework.data.annotation.Id;
@Entity
@Data
public class Configuration {
    private Key id;
    private String data;
And a simple repo:
@RepositoryRestResource
@Repository
@Transactional(isolation = Isolation.SERIALIZABLE)
public interface ConfigurationRepository extends DatastoreRepository<Configuration, Key>{
What are these missed converters and how can I register them?
        
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