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+---
+page_title: "Migration Guide: Service Accounts Authentication"
+---
+
+# Migration Guide: Service Accounts Authentication
+
+This guide helps you migrate from Programmatic Access Key (PAK) authentication to Service
+Accounts (SA) authentication and viceversa without impacting your deployment. 
+
+**Note:** For more information on SA, see [Service Accounts Overview](https://www.mongodb.com/docs/atlas/api/service-accounts-overview/)
+in the MongoDB documentation.
+
+## Procedure
+
+1. Change your provider declaration variables.
+
+    The following example declares PAK authentication:
+
+    ```terraform
+    provider "mongodbatlas" {
+    public_key = var.mongodbatlas_public_key
+    private_key  = var.mongodbatlas_private_key
+    ```
+
+    To change to SA, declare the variables as in the following example:
+
+    ```terraform
+    provider "mongodbatlas" {
+    client_id = var.mongodbatlas_client_id
+    client_secret  = var.mongodbatlas_client_secret
+    }
+    ```
+
+2. Provide a valid JSON Web Token (JWT):
+
+   ```terraform
+   provider "mongodbatlas" { 
+   access_token = var.mongodbatlas_access_token
+   [is_mongodbgov_cloud = true // optional]
+   }
+   ```
+
+    The JWT token is only valid during its set duration time. See [Generate Service Account Token](https://www.mongodb.com/docs/atlas/api/service-accounts/generate-oauth2-token/#std-label-generate-oauth2-token-atlas) for more details on creating an SA token.
+
+   **IMPORTANT:**  Currently, the MongoDB Terraform provider does not support additional Token OAuth features.
+
+   **NOTE:** You can not use ``mongodbatlas_event_trigger`` with Service Accounts as the authentication method.
+
+
+
+
+