# .Net Wrapper Authentication Failure

**URL:** <https://devforum.zoom.us/t/net-wrapper-authentication-failure/14741>\
**Category:** Windows\
**Created:** [April 24, 2020, 9:38am UTC](https://devforum.zoom.us/t/net-wrapper-authentication-failure/14741 "2020-04-24T09:38:29Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![garry](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/garry/32/6893_2.png) [@garry](https://devforum.zoom.us/u/garry)\
**Post date:** [April 24, 2020, 10:09am UTC](https://devforum.zoom.us/t/net-wrapper-authentication-failure/14741/2 "2020-04-24T10:09:47Z")

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So I found another URL: [https://marketplace.zoom.us/docs/sdk/native-sdks/windows/c-sharp-wrapper](https://marketplace.zoom.us/docs/sdk/native-sdks/windows/c-sharp-wrapper) which explained how to copy binaries and .h files (why?), but more importantly set the run mode to BUILD.  
This now shows the start\_join\_meeting dialogue.  
Given the adoption by Zoom of mandatory passwords, there is no password field for joining a meeting, so I added one to the XAML and C#:

 ![zoom-password](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/2X/9/999ff8624a5c840cd143483a6ef98450f6968cd3.jpeg)

What is the “Access Token”, and UserID/UserToken required to start a meeting?

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