public im.turms.server.common.access.client.dto.model.common.Value.Builder addCustomAttributesBuilder() {
            return getCustomAttributesFieldBuilder()
                    .addBuilder(im.turms.server.common.access.client.dto.model.common.Value
                            .getDefaultInstance());
        }
<code>repeated .im.turms.proto.Value custom_attributes = 15;</code>
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/model/user/UserSession.java