msp: document TFC Entitle must log in first (#8422)

Co-authored-by: bobheadxi <[email protected]>

content/departments/engineering/teams/core-services/managed-services/platform.md

@@ -93,7 +93,10 @@ These custom roles are configured [in `gcp/org/customer-roles/msp.tf` in the inf
 
 Terraform Cloud (TFC) workspaces for MSP [can be found using the `msp` workspace tag](https://app.terraform.io/app/sourcegraph/workspaces?tag=msp).
 
-To gain access to MSP project TFC workspaces, [request membership to the `Managed Services Platform Operators` TFC team via Entitle](https://app.entitle.io/request?data=eyJkdXJhdGlvbiI6IjM2MDAiLCJqdXN0aWZpY2F0aW9uIjoiRU5URVIgSlVTVElGSUNBVElPTiBIRVJFIiwicm9sZUlkcyI6W3siaWQiOiJiMzg3MzJjYy04OTUyLTQ2Y2QtYmIxZS1lZjI2ODUwNzIyNmIiLCJ0aHJvdWdoIjoiYjM4NzMyY2MtODk1Mi00NmNkLWJiMWUtZWYyNjg1MDcyMjZiIiwidHlwZSI6InJvbGUifV19).
+To gain access to MSP project TFC workspaces, [log in to Terraform Cloud](https://app.terraform.io/app/sourcegraph) and _then_ [request membership to the `Managed Services Platform Operators` TFC team via Entitle](https://app.entitle.io/request?data=eyJkdXJhdGlvbiI6IjM2MDAiLCJqdXN0aWZpY2F0aW9uIjoiRU5URVIgSlVTVElGSUNBVElPTiBIRVJFIiwicm9sZUlkcyI6W3siaWQiOiJiMzg3MzJjYy04OTUyLTQ2Y2QtYmIxZS1lZjI2ODUwNzIyNmIiLCJ0aHJvdWdoIjoiYjM4NzMyY2MtODk1Mi00NmNkLWJiMWUtZWYyNjg1MDcyMjZiIiwidHlwZSI6InJvbGUifV19).
 This TFC team has access to all MSP workspaces, and is [configured here](https://sourcegraph.sourcegraph.com/github.com/sourcegraph/infrastructure/-/blob/terraform-cloud/terraform.tfvars?L44:1-48:4).
 
+Note that you **must [log in to Terraform Cloud](https://app.terraform.io/app/sourcegraph) before making your Entitle request**.
+If you make your Entitle request, then log in, you will be removed from any team memberships granted through Entitle by Terraform Cloud's SSO implementation.
+
 For more details, also see [creating and configuring services](https://github.com/sourcegraph/managed-services#operations).