When I checked my added credential, it was gone. I already re-created the OAuth Client ID and generated our RefreshToken for .NET so it's OK now. But I want to know what may have caused it to be deleted on its own? Is there even a remote possibility of this happening? Or did I missed any requirements that may have caused it to expire? But it should have at least notify me... right?
To give a little background:
We used to use a different email where our OAuth Client ID credential was created into but that email was deleted and so we created a new gmail account to use. A couple of days ago we set-up this new gmail with the the OAuth 2.0 Client ID (Installed App type same as before), and was generated a RefreshToken for .NET using the latest library's generator (adwords_dotnet_lib_v21.1.0). That email is given a Read-Only access in our AdWords MCC (just like the previous email had) that enables us to query reports, and so our app was working again like before until I got that error this morning.
Again, it's fixed now, but I want to know possible reasons of it getting lost on its own so I know what to do (if there is something I can do).
Thank you in advance! ^__^