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AGreenTejada's avatar
AGreenTejada
Helpful | Level 5
6 years ago

C# ProcessCodeFlowAsync() invalid_grant error

Hello everyone, I'm a year young to C# and brand new to the concept of API's. Been having sometime struggling with the OAuth process using the OAuth2Helper class. While I already have the AppKey ...
API
Huezzer's avatar
Huezzer
Explorer | Level 4
2 years ago

Hey!

 

I know this is an old thread but this may help someone. I was using the API "DropboxOAuth2Helper.ProcessCodeFlowAsync" and got the same error -  "invalid_grant". The solution was to make sure that the redirectUri passed into "GetAuthorizeUri", matches the one passed into "ProcessCodeFlowAsync" if you're doing the whole flow. Then it worked just fine!

 

Have a nice day everyone! 

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