Apply suggestions from code review

Co-authored-by: Casper da Costa-Luis <casper.dcl@physics.org>

docs/guides/authentication.md

@@ -17,9 +17,9 @@ $ terraform apply
 - `AWS_SECRET_ACCESS_KEY` - Secret access key.
 - `AWS_SESSION_TOKEN` - (Optional) Session token.
 
-See the [AWS documentation](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-envvars.html) for more information.
+See the [AWS documentation](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-envvars.html) to obtain these variables directly.
 
-Alternatively, authenticate following the [official Terraform provider documentation](https://registry.terraform.io/providers/hashicorp/aws/latest/docs#authentication-and-configuration) and run the following commands in the [`docs/guides/permissions/aws`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/aws) directory.
+Alternatively, for more idiomatic or advanced use cases, follow the [Terraform AWS provider documentation](https://registry.terraform.io/providers/hashicorp/aws/latest/docs#authentication-and-configuration) and run the following commands in the [`permissions/aws`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/aws) directory:
 
 ```bash
 terraform init && terraform apply
@@ -34,9 +34,9 @@ export AWS_SECRET_ACCESS_KEY="$(terraform output --raw aws_secret_access_key)"
 - `AZURE_SUBSCRIPTION_ID` - Subscription identifier.
 - `AZURE_TENANT_ID` - Tenant identifier.
 
-See the [Azure documentation](https://docs.microsoft.com/en-us/python/api/azure-identity/azure.identity.environmentcredential) for more information.
+See the [Azure documentation](https://docs.microsoft.com/en-us/python/api/azure-identity/azure.identity.environmentcredential) to obtain these variables directly.
 
-Alternatively, authenticate following the [official Terraform provider documentation](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/guides/azure_cli) and run the following commands in the [`docs/guides/permissions/az`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/az) directory.
+Alternatively, for more idiomatic or advanced use cases, follow the [Terraform Azure provider documentation](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/guides/azure_cli) and run the following commands in the [`permissions/az`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/az) directory:
 
 ```bash
 terraform init && terraform apply
@@ -50,9 +50,9 @@ export AZURE_CLIENT_SECRET="$(terraform output --raw azure_client_secret)"
 
 - `GOOGLE_APPLICATION_CREDENTIALS` - Path to (or contents of) a service account JSON key file.
 
-See the [GCP documentation](https://cloud.google.com/docs/authentication/getting-started#creating_a_service_account) for more information.
+See the [GCP documentation](https://cloud.google.com/docs/authentication/getting-started#creating_a_service_account) to obtain these variables directly.
 
-Alternatively, authenticate following the [official Terraform provider documentation](https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/getting_started) and run the following commands in the [`docs/guides/permissions/gcp`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/gcp) directory.
+Alternatively, for more idiomatic or advanced use cases, follow the [Terraform GCP provider documentation](https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/getting_started) and run the following commands in the [`permissions/gcp`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/gcp) directory:
 
 ```bash
 terraform init && terraform apply
@@ -66,7 +66,7 @@ Either one of:
 - `KUBECONFIG` - Path to a [`kubeconfig` file](https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/#the-kubeconfig-environment-variable).
 - `KUBECONFIG_DATA` - Alternatively, the **contents** of a `kubeconfig` file.
 
-Alternatively, authenticate with your local `kubeconfig` file and run the following commands in the [`docs/guides/permissions/k8s`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/k8s) directory.
+Alternatively, authenticate with a local `kubeconfig` file and run the following commands in the [`permissions/k8s`](https://github.com/iterative/terraform-provider-iterative/tree/master/docs/guides/permissions/k8s) directory:
 
 ```bash
 kubectl apply --filename main.yml