Optional arguments in documents

[apex-omontgomery]

Terraform docs show that all arguments are optional. In practice I've found that the minimum arguments required are:

• oauth_scopes
• credentials
• impersonated_user_email

Anything less than this and I cannot do read-only actions (import), or write actions. Am I misunderstanding what required versus optional means in a terraform provider concept or are the docs incorrect?

If the docs need to be updated- would you accept a PR to specify any changes?