Repository 'UpdateSiteSourceControl' operation failed with Microsoft.Web.Hosting.SourceControls.OAuthException: GitHub Bad credentials

I'm having this error when trying to deploy an Azure Web App using Github repo.

{
    "status": "Failed",
    "error": {
        "code": "BadRequest",
        "message": "<Error xmlns=\"http://schemas.microsoft.com/windowsazure\" xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\"><Code>BadRequest</Code><Message>Repository 'UpdateSiteSourceControl' operation failed with Microsoft.Web.Hosting.SourceControls.OAuthException: GitHub GetSecretsPublicKey: Bad credentials&#xD;\n   at Microsoft.Web.Hosting.SourceControls.GitHubProxy.&lt ...

I used the authorize button in the Deployment Center to link the Github account. I've tried to revoke the old access from Azure in Github and tried again but it's not working.

Repository 'UpdateSiteSourceControl' operation failed with Microsoft.Web.Hosting.SourceControls.OAuthException: GitHub Bad credentials

Initially even I got the same error.

This is because Azure App Service is not registered in Authorized OAuth Apps.

Follow the below steps to regsiter the Azure App Service.

• First create an Azure App Service.
• Navigate to GitHub => in Right hand pane select Settings => select Developer settings in the left hand pane => OAuth Apps => Register a new Application.

• ClientID and Client Secret will be created, copy those for later use.
• Navigate to the created Azure App Service => Authentication => Add Identity Provider => select GitHub and provide the ClientID and SecretID from GitHub.

• In Azure App Service => Deployment center = >select source as GitHub and click on Change Account => Authorize AzureAppService.

• Now you can see the Azure App Service in GitHub => Applications => Authorized OAuth Apps.

• Now Iam able to Build Application with GitHub in Deployment center.

• This settings has to be done only once.
• From next deployment, you can simply select and build GitHub source without any issues.