How to use the @celo/contractkit/lib/identity.IdentityMetadataWrapper.fromFile function in @celo/contractkit

async run() {
    const res = this.parse(ShowMetadata)
    const metadata = IdentityMetadataWrapper.fromFile(res.args.file)
    console.info(`Metadata at ${res.args.file} contains the following claims: \n`)
    displayMetadata(metadata)
  }
}

export const modifyMetadata = async (
  filePath: string,
  operation: (metadata: IdentityMetadataWrapper) => Promise
) => {
  const metadata = IdentityMetadataWrapper.fromFile(filePath)
  await operation(metadata)
  writeFileSync(filePath, metadata.toString())
}

protected readMetadata = () => {
    const { args } = this.parse(this.self)
    const filePath = args.file
    try {
      cli.action.start(`Read Metadata from ${filePath}`)
      const data = IdentityMetadataWrapper.fromFile(filePath)
      cli.action.stop()
      return data
    } catch (error) {
      cli.action.stop(`Error: ${error}`)
      throw error
    }
  }