message: format name to be valid metric prefix
diff: @@ -26,7 +26,7 @@ export class BaseService<T> {
  this.name = name
  this.options = mergeDefaultOptions(options, optionSettings)
  this.logger = new Logger({ name })
  - this.metrics = new Metrics({ prefix: name })
  + this.metrics = new Metrics({ prefix: name.split(' ').join('_') })
  }
  /**
  