Your question is not clear. You are referring to apigeeClientId and apigeeClientPassword - what are those things? Are you reading some documentation or tutorial that refers to those things? Maybe you could cite the documentation link?
Client-id and client-secret are part of client-credentials . In GCP they can be created under APIs and Services - > Credentials - > OAuth2.0 Client IDs. Apigee proxy can have its own client id and client-secret which can then be mapped to the gcp client credentials using key value map policy