@java.lang.Override
          public Builder mergeFrom(com.google.protobuf.Message other) {
            if (other
                instanceof
                com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.IapCredential
                    .IapTestServiceAccountInfo) {
              return mergeFrom(
                  (com.google.cloud.websecurityscanner.v1.ScanConfig.Authentication.IapCredential
                          .IapTestServiceAccountInfo)
                      other);
            } else {
              super.mergeFrom(other);
              return this;
            }
          }
<pre>
Describes authentication configuration when Web-Security-Scanner
service account is added in Identity-Aware-Proxy (IAP) access policies.
</pre>

Protobuf type {@code
google.cloud.websecurityscanner.v1.ScanConfig.Authentication.IapCredential.IapTestServiceAccountInfo}
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1/src/main/java/com/google/cloud/websecurityscanner/v1/ScanConfig.java