Multiple Feign clients with different interceptors

I have two Feign clients in Spring Boot doing different things, but would like them to be authenticated differently.

@FeignClient(
    name = "...",
    url = "${url1}",
    configuration = Config1.class
)
public interface Client1 {
    @PostMapping(
        path = "...",
        consumes = MediaType.APPLICATION_JSON_VALUE,
        produces = MediaType.APPLICATION_JSON_VALUE)
    JsonNode doThing(@RequestBody JsonNode thing);
}

@FeignClient(
    name = "...",
    url = "${url2}",
    configuration = Config2.class
)
public interface Client2 {
    @PostMapping(
        path = "...",
        consumes = MediaType.APPLICATION_JSON_VALUE,
        produces = MediaType.APPLICATION_JSON_VALUE)
    JsonNode doThing(@RequestBody JsonNode thing);
}

They both need basic authentication, but different values for username and password. For that, I thought about having separate Config classes to set their respective clients:

@Configuration
public class Client1 {
    private final String user;
    private final String password;

    public Client1(final Config1 config) {
        this.user = config.getUser();
        this.password = config.getPassword();
    }

    @Bean(name = "client1")
    public BasicAuthRequestInterceptor basicAuthRequestInterceptor() {
        return new BasicAuthRequestInterceptor(user, password);
    }
}

@Configuration
public class Client2 {
    private final String user;
    private final String password;

    public Client1(final Config2 config) {
        this.user = config.getUser();
        this.password = config.getPassword();
    }

    @Bean(name = "client2")
    public BasicAuthRequestInterceptor basicAuthRequestInterceptor() {
        return new BasicAuthRequestInterceptor(user, password);
    }
}

But my API is returning HTTP 4xx errors, as if the interceptor did not work at all. Can I get some pointers on setting this up properly?

(Notice that I gave those beans names, because they will otherwise conflict for DI.)

I guess You have to remove the stereotype @Configuration.

I actually came here during a search to a similar problem. I do have (same like You) two different configs. One FeignClient with and a second client without auth. But the second client is using both RequestInterceptors (I implemented a noop-RequestInterceptor just for logging).

Could You actually solve your problem?