Custom Spring Boot Starter Gradle api vs implementation dependencies

I'm creating a custom spring boot starter which configures a bean from a different spring boot starter.

// my custom starter's build.gradle

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
}

// my-custom-starter's auto configuration

@Autoconfiguration
public class MyAutoconfiguration {

    @Bean
    public JwtDecoder jwtDecoder() {
        return ...
    }

}

In my testing, it seems like whoever imports my custom starter needs to also bring in spring-boot-starter-oauth2-client as a dependency if they want access to the JwtDecoder, unless I change it to an api dependency:

// my custom starter's build.gradle

dependencies {
    api 'org.springframework.boot:spring-boot-starter-oauth2-client'
}

Is this a bad practice, or would it cause issues in the future with conflicting dependencies?