[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Fetch](./puppeteer.protocol.fetch.md) > [AuthChallengeResponse](./puppeteer.protocol.fetch.authchallengeresponse.md) > [username](./puppeteer.protocol.fetch.authchallengeresponse.username.md) ## Protocol.Fetch.AuthChallengeResponse.username property The username to provide, possibly empty. Should only be set if response is ProvideCredentials. Signature: ```typescript username?: string; ```