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Forum Discussion
Invalid_Grant whlie generating Access Token using saved Refresh token in Dropbox Sign .NET SDK
Hello Greg-DB ,
I am using the following Dropbox Sign .NET SDK code in my project to generate Dropbox Sign Access token using previously saved Refresh token.
public async Task<TokenRes...
[Cross-linking for reference: https://stackoverflow.com/questions/78296262/why-am-i-getting-invalid-grant-error-while-using-refresh-token-to-generate-acces ]
Hi Gagan,
Thank you for reaching out, it looks like you are receiving aninvalid_granterror. This error typically occurs when using a stored refresh token and one of the following is true:
- Scopes for the OAuth API app have changed
- The user revoked authorization to the OAuth API app
- The OAuth API app is approved multiple times by the same user—this will cause the previous authorization to reset and a new refresh token to be generated.
If any of these actions have occurred, please try completing the authorization process again for the user to generate a newaccess_tokenandrefresh_token. Try using the newrefresh_tokento generate any newaccess_tokenafter the initialaccess_tokenexpires. Please see our OAuth Walkthrough documentation for more details.
If the issue persists, please submit a support request, along with the code snippet you just provided, so we can further assist you in determining why that error is being thrown. Thanks!
Spencer H
Dropbox Staff
Dropbox Staff[Cross-linking for reference: https://stackoverflow.com/questions/78296262/why-am-i-getting-invalid-grant-error-while-using-refresh-token-to-generate-acces ]
Hi Gagan,
Thank you for reaching out, it looks like you are receiving an invalid_grant error. This error typically occurs when using a stored refresh token and one of the following is true:
- Scopes for the OAuth API app have changed
- The user revoked authorization to the OAuth API app
- The OAuth API app is approved multiple times by the same user—this will cause the previous authorization to reset and a new refresh token to be generated.
If any of these actions have occurred, please try completing the authorization process again for the user to generate a new access_token and refresh_token. Try using the new refresh_token to generate any new access_token after the initial access_token expires. Please see our OAuth Walkthrough documentation for more details.
If the issue persists, please submit a support request, along with the code snippet you just provided, so we can further assist you in determining why that error is being thrown. Thanks!
Thank you for the reply.
For me, the issue was due to:
- The OAuth API app is approved multiple times by the same user—this will cause the previous authorization to reset and a new refresh token to be generated.
