credentials expires with .NET client

[PPC Developer]

Hi,

I have this .NET application written in C#, using .NET client libraries. The documentation says that the client libraries should handle refreshing the token. However, my app gets this exception AdWordsCredentialsExpiredException after running a few hours.

How do I handle this so my app never stops? This is a server component that is expected to run indefinitely, in a loop, downloads reports and does some processing.

Thanks a lot,
D.

[Raghavendra Soudala (AdWords API Team)]

Hi PPC Developer,

When you generated your OAuth credentials, did you set the access_type to online? If so, then you only received an access_token, and an access_token will expire in roughly one hour.

Could you try generating your OAuth credentials, but this time request an access_type of offline? This will give you a refresh token which you can store in your web.config file, and the client library will automatically obtain new access tokens for you. With this setup you shouldn't get any interruptions.

We also have a guide and a github wiki page that might help you in setting this up. 

Cheers,

Raghavendra, AdWords API Team.

[PPC Developer]

Hi Raghavendra,

Thanks for the response. I generated the API keys using "installed application" mode, which gave me a refresh token as well. I'm pasting below my app.config file, to show that I do have a refresh token. The interesting thing is that I have another application using the same credentials, running on a separate server, which modifies the bids. That application is running non-stop spanning a few days for now. However, this particular application throws credentialsexpired error when creating campaigns or ad groups. The two apps are using the same app.config file, and same .NET client libraries. See below please.

    <add key="MaskCredentials" value="true" />

 
    <add key="UserAgent" value="xxx" />
    <add key="DeveloperToken" value="xxx" />

    <add key="ClientCustomerId" value="xxx" />

    <add key="SkipReportHeader" value="false" />
    <add key="SkipReportSummary" value="false" />
   
    <add key="OAuth2ClientId" value="xxx" />
    <add key="OAuth2ClientSecret" value="xxx" />

    <add key="OAuth2Mode" value="APPLICATION" />
  
    <add key="OAuth2RefreshToken" value="xxx" />

[Raghavendra Soudala (AdWords API Team)]

Hi PPC Developer,

Are the two applications actually pointing at the same file, or are they simply copies of each other? I ask because I'm wondering if you configured RetryCount (as explained on our OAuth github page) in one file, but not in the other.

If that doesn't resolve the issue, please let me know.

Cheers,

Raghavendra, AdWords API Team.