Retrofit error-Missing either @GET URL or @Url parameter
<p>I am working on Youtube API.
The base URL is <code>&lt;https://www.googleapis.com/youtube/v3/search/&gt;</code></p>

<p>Request :GET</p>

<pre><code>https://www.googleapis.com/youtube/v3/search?part=snippet&amp;q={search_keyword}&amp;key={API_KEY}
</code></pre>

<p>ApiService Interface code-</p>

<pre><code>public interface ApiService {
    @GET("")
    Call&lt;YoutubeResponse&gt; searchVideos(@Query("part") String part,
                                   @Query("q") String q,@Query("key") String apiKey);
}
</code></pre>

<p>The error: <strong>java.lang.IllegalArgumentException: Missing either @GET URL or @Url parameter.</strong>
in the line of code</p>

<pre><code>Call&lt;YoutubeResponse&gt; call=service.searchVideos("snippet",s, URLConstants.Youtube_API_KEY);
</code></pre>

<p>I'm a beginner. Please help!</p>