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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
AGreenTejada's avatar
AGreenTejada
Helpful | Level 5

Hey all,

Alright, I think I just solved my own problem. Since I was testing ProcessCodeFlow() using try/catch, I couldn't use the same auth code twice in the same process. Eliminating that loop allowed me to change the access code.

Greg-DB's avatar
Greg-DB
Icon for Dropbox Staff rankDropbox Staff
6 years ago

Thanks for following up. I'm glad to hear you already sorted this out. Yes, the Dropbox API OAuth 2 authorization codes can only be used once each. 

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