[java] 'Field required a bean of type that could not be found.' error spring restful API using mongodb

In order to spring to create bean and inject it class should be marked with @Componet,@service,@Repository etc in your context it should be

package main.java.service;

import java.util.List;
import main.java.model.User;
import org.springframework.data.mongodb.repository.MongoRepository;
@Repository
public interface UserService extends MongoRepository<User, String> {
    public List<User> findAll();
}

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