Hosting AWS Amplify using Terraform

I am trying to build a CI/CD pipeline using terraform. I am creating .tf files for Amplify modules as I am creating my React application in AWS Amplify with GRAPHQL API backend. While writing the code in HCL I am trying to connect connecting my Github enterprise repository. After doing terraform apply I get the following error:

creating Amplify App (SelfServiceDashboard): BadRequestException: Repository provider not supported.

Also I read somewhere in support that GitHub enterprise is not supported by AWS amplify. Could you suggest an alternative how to setup terraform for aws amplify?