public com.google.protobuf.ByteString getServiceAccountEmailBytes() {
      java.lang.Object ref = serviceAccountEmail_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        serviceAccountEmail_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
[Service account email](https://cloud.google.com/iam/docs/service-accounts)
to be used for generating OIDC token.
The service account must be within the same project as the queue. The
caller must have iam.serviceAccounts.actAs permission for the service
account.
</pre>

<code>string service_account_email = 1;</code>

@return The bytes for serviceAccountEmail.
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/OidcToken.java