Note:

Before you can publish an extension or visual application from the Designer, the pipeline's deployment job must be configured to deploy to the target Oracle Cloud Applications or Visual Builder instance.

• If your deployment job uses Basic authentication, credentials of a user who can connect and deploy to the target instance must be provided. If your project owner hasn't provided these credentials, you'll be prompted for them when you click Publish for the first time. If valid, the credentials will be permanently saved in the deployment job. If you don't know the credentials, you'll need to talk to your project owner or an administrator. Your administrator may choose to enter the credentials directly in the build job instead, so you aren't prompted for them when you try to deploy your extension or visual app.
• If the deployment job uses OAuth, authorization must be provided for OAuth tokens to be created with the credentials of a user who has permissions to connect and deploy to the target instance. You won't be able to publish without this authorization. It is recommended that you authorize your connection during initial job configuration—though you'll be prompted to authorize missing or expired OAuth tokens when you click Publish.

See Create a Deployment Build Job for extensions or Configure the Deployment Job for visual applications.