Add login for HCP EU to CLI command

Author: rkoron007

content/terraform/v1.13.x/docs/cli/commands/login.mdx

@@ -22,6 +22,18 @@ Usage: `terraform login [hostname]`
 If you don't provide an explicit hostname, Terraform will assume you want to
 log in to HCP Terraform at `app.terraform.io`.
 
+<Note>
+
+If you are in an HCP Europe organization, login to the HCP Europe environment by specifying the hostname:
+
+```shell-session
+$ terraform login app.terraform.io/eu
+```
+
+To learn more about HCP Europe, refer to [Use HCP Terraform in Europe](/terraform/cloud-docs/europe).
+
+</Note>
+
 ## Credentials Storage
 
 By default, Terraform will obtain an API token and save it in plain text in a

content/terraform/v1.14.x (beta)/docs/cli/commands/login.mdx

@@ -22,6 +22,18 @@ Usage: `terraform login [hostname]`
 If you don't provide an explicit hostname, Terraform will assume you want to
 log in to HCP Terraform at `app.terraform.io`.
 
+<Note>
+
+If you are in an HCP Europe organization, login to the HCP Europe environment by specifying the hostname:
+
+```shell-session
+$ terraform login app.terraform.io/eu
+```
+
+To learn more about HCP Europe, refer to [Use HCP Terraform in Europe](/terraform/cloud-docs/europe).
+
+</Note>
+
 ## Credentials Storage
 
 By default, Terraform will obtain an API token and save it in plain text in a