I have created a build trigger to build a cloud function from a BitBucket repository when the main branch is pushed. The trigger fires, but the build fails due to lack of permissions for creating the function itself.
I want to update the service account to give it the required permissions but I have run into an issue.
The cloud build details say that it was executed using the expected service account
{project number}@cloudbuild.gserviceaccount.com
but when I go to "IAM & Admin > IAM" no such service account is listed
I am the owner of the GCP project, so if it exists I should see it.
How might I go about fixing the problem?
Because the account doesn't belong to your project. You have to check Include Google-provided role grants.
In fact, this is well documented so check the docs first.