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Question

Invalid user credentials when trying to login on C# app

  • May 22, 2025
  • 4 replies
  • 34 views
C
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Hello,

today i have very interesting problem. Every app works last day without problems on .NET Framework, but today, when i trying to get access token, i get instantly error about Invalid user credentials. User on other laptop in company have same app and can login without problems, even when i tried my own creds, it works. On my laptop, when i try to get access token via oauth2 directly via browser, i can succesfully authenticate. but webbrowser on .net throw error as i mentioned on beginning and funny fact, sometimes after error i try to auth again and must proceed via captcha, and then i get authed...

 

Anyone who had this problem sometimes and know how to fix it? it works fine last day, but today is mystery day as i see.

 

Thank you.

    4 replies

    C
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    Tried it now again, first time got error invalid user credentials and second time when captcha popup and verify im not a robot then i can login without problems...

    C
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    Edit, it seems my account have captcha requirements. Even when i tried FTP via cmd, i get error 530 Box: CAPTCHA is required. Please log into www.box.com in a web browser, and then try again.I tried to login, but webbrowser dont ask for captcha and even when im logged in to box via browser, still getting this error.

    C
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    Hi Bailando. We do not enforce any Captcha in our API. Are you on a corporate VPN or Proxy that might be throwing this CAPTCHA?

    C
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    Bailando isnt using the API; they say they are using FTP via cmd.

    I am also using FTP and it is saying to me "CAPTCHA is required" and i login via web browser and click the "I am not a robot" and login fine, but FTP continues to fail saying "CAPTCHA is required"; this is terrible!

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