private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.vertexai.api.ApiAuth.ApiKeyConfig,
              com.google.cloud.vertexai.api.ApiAuth.ApiKeyConfig.Builder,
              com.google.cloud.vertexai.api.ApiAuth.ApiKeyConfigOrBuilder>
          getClientSecretFieldBuilder() {
        if (clientSecretBuilder_ == null) {
          clientSecretBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.vertexai.api.ApiAuth.ApiKeyConfig,
                  com.google.cloud.vertexai.api.ApiAuth.ApiKeyConfig.Builder,
                  com.google.cloud.vertexai.api.ApiAuth.ApiKeyConfigOrBuilder>(
                  getClientSecret(), getParentForChildren(), isClean());
          clientSecret_ = null;
        }
        return clientSecretBuilder_;
      }
<pre>
The application secret for the app registered in Azure.
</pre>

<code>.google.cloud.vertexai.v1.ApiAuth.ApiKeyConfig client_secret = 2;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/SharePointSources.java