# Getting a disalowed\_useragent when using Google authentication in Xamarin

**URL:** <https://community.auth0.com/t/getting-a-disalowed-useragent-when-using-google-authentication-in-xamarin/6581>\
**Category:** Get Help\
**Tags:** android, xamarin\
**Created:** [May 11, 2017, 5:42pm UTC](https://community.auth0.com/t/getting-a-disalowed-useragent-when-using-google-authentication-in-xamarin/6581 "2017-05-11T17:42:26Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![arno.pancken](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/User_font_awesome.svg/768px-User_font_awesome.svg.png) [@arno.pancken](https://community.auth0.com/u/arno.pancken)\
**Post date:** [May 11, 2017, 5:42pm UTC](https://community.auth0.com/t/getting-a-disalowed-useragent-when-using-google-authentication-in-xamarin/6581/1 "2017-05-11T17:42:26Z")

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The application was working before, but now throws the following error:

```
403: disalowed_useragent

```

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<div class="post-metadata">

**Author:** ![jmangelo](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/jmangelo/32/7923_2.png) [@jmangelo](https://community.auth0.com/u/jmangelo)\
**Post date:** [May 17, 2017, 4:23pm UTC](https://community.auth0.com/t/getting-a-disalowed-useragent-when-using-google-authentication-in-xamarin/6581/2 "2017-05-17T16:23:54Z")

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The error in question is due to a relatively recent change from Google in terms of what user agents it supports for performing user authentication/authorization.

We have released a new SDK that is compatible with the supported approaches from Google, but depending on what you were using before it may require some changes to your application.

For reference information see:

- SDK - [GitHub - auth0/auth0-oidc-client-net: OIDC Client for .NET Desktop and Mobile applications](https://github.com/auth0/auth0-oidc-client-net)
- SDK Docs - [Auth0 OIDC Client](https://auth0.github.io/auth0-oidc-client-net/)
- Xamarin Quickstart - [Auth0 Xamarin SDK Quickstarts: Login](https://auth0.com/docs/quickstart/native/xamarin)

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/auth0/original/3X/b/5/b560f266932fcce5d57f09a6595bd50518cae3f3.jpeg) [@system](https://community.auth0.com/u/system)\
**Post date:** [March 2, 2018, 5:53am UTC](https://community.auth0.com/t/getting-a-disalowed-useragent-when-using-google-authentication-in-xamarin/6581/3 "2018-03-02T05:53:51Z")

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