Revert #6458 (ClickPipes AWS IAM auth docs)

docs/integrations/data-ingestion/clickpipes/mysql/source/aurora.md

@@ -129,16 +129,6 @@ Connect to your Aurora MySQL instance as an admin user and execute the following
     GRANT REPLICATION SLAVE ON *.* TO 'clickpipes_user'@'%';
     ```
 
-### Using IAM authentication (optional) {#iam-authentication}
-
-Instead of a password, you can authenticate the ClickPipes user via AWS IAM role-based access. Create the user as follows, then grant it the same schema and replication privileges shown above:
-
-```sql
-CREATE USER 'clickpipes_iam_user' IDENTIFIED WITH AWSAuthenticationPlugin AS 'RDS';
-```
-
-See [AWS IAM DB authentication (RDS/Aurora)](/integrations/clickpipes/postgres/auth) for the full steps to set up the IAM role and policy required for ClickPipes to authenticate this way.
-
 ## Configure network access {#configure-network-access}
 
 ### IP-based access control {#ip-based-access-control}

docs/integrations/data-ingestion/clickpipes/mysql/source/rds.md

@@ -133,16 +133,6 @@ Connect to your RDS MySQL instance as an admin user and execute the following co
     GRANT REPLICATION SLAVE ON *.* TO 'clickpipes_user'@'%';
     ```
 
-### Using IAM authentication (optional) {#iam-authentication}
-
-Instead of a password, you can authenticate the ClickPipes user via AWS IAM role-based access. Create the user as follows, then grant it the same schema and replication privileges shown above:
-
-```sql
-CREATE USER 'clickpipes_iam_user' IDENTIFIED WITH AWSAuthenticationPlugin AS 'RDS';
-```
-
-See [AWS IAM DB authentication (RDS/Aurora)](/integrations/clickpipes/postgres/auth) for the full steps to set up the IAM role and policy required for ClickPipes to authenticate this way.
-
 ## Configure network access {#configure-network-access}
 
 ### IP-based access control {#ip-based-access-control}

docs/integrations/data-ingestion/clickpipes/postgres/auth.md

@@ -15,27 +15,13 @@
 
 This article demonstrates how ClickPipes customers can leverage role-based access to authenticate with Amazon Aurora and RDS and access their databases securely.
 
-## Setup {#setup}
-
-### Before you start {#before-you-start}
-
-#### Make sure IAM authentication is enabled {#make-sure-iam-authentication-is-enabled}
-
-1. Login to your AWS Account and navigate to the RDS instance you want to configure.
-2. Click on the **Modify** button.
-3. Scroll down to the **Database authentication** section.
-4. Enable the **Password and IAM database authentication** option.
-5. Click on the **Continue** button.
-6. Review the changes and click on the **Apply immediately** option.
-
-#### Setting up the database user {#setting-up-the-database-user}
+:::warning
+For AWS RDS Postgres and Aurora Postgres you can only run `Initial Load Only` ClickPipes due to the limitations of the AWS IAM DB authentication.
 
-Connect to your RDS/Aurora instance and create a database user with IAM authentication enabled, then follow the rest of the steps in your source setup guide to configure your instance for ClickPipes:
+For MySQL and MariaDB, this limitation doesn't apply, and you can run both `Initial Load Only` and `CDC` ClickPipes.
+:::
 
-- [AWS Aurora for PostgreSQL source setup guide](./source/aurora#configure-database-user)
-- [AWS RDS for PostgreSQL source setup guide](./source/rds#configure-database-user)
-- [AWS Aurora for MySQL source setup guide](../mysql/source/aurora#configure-database-user)
-- [AWS RDS for MySQL source setup guide](../mysql/source/rds#configure-database-user)
+## Setup {#setup}
 
 ### Obtaining the ClickHouse service IAM role Arn {#obtaining-the-clickhouse-service-iam-role-arn}
 
@@ -53,14 +39,43 @@
 
 Let's call this value `{ClickHouse_IAM_ARN}`. This is the IAM role that will be used to access your RDS/Aurora instance.
 
-### Setting up the IAM role {#setting-up-iam-role}
+### Configuring the RDS/Aurora instance {#configuring-the-rds-aurora-instance}
+
+#### Enabling IAM DB Authentication {#enabling-iam-db-authentication}
+1. Login to your AWS Account and navigate to the RDS instance you want to configure.
+2. Click on the **Modify** button.
+3. Scroll down to the **Database authentication** section.
+4. Enable the **Password and IAM database authentication** option.
+5. Click on the **Continue** button.
+6. Review the changes and click on the **Apply immediately** option.
 
 #### Obtaining the RDS/Aurora Resource ID {#obtaining-the-rds-resource-id}
 
 1. Login to your AWS Account and navigate to the RDS instance/Aurora Cluster you want to configure.
 2. Click on the **Configuration** tab.
 3. Note the **Resource ID** value. It should look like `db-xxxxxxxxxxxxxx` for RDS or `cluster-xxxxxxxxxxxxxx` for Aurora cluster. Let's call this value `{RDS_RESOURCE_ID}`. This is the resource ID that will be used in the IAM policy to allow access to the RDS instance.
 
+#### Setting up the Database User {#setting-up-the-database-user}
+
+##### PostgreSQL {#setting-up-the-database-user-postgres}
+
+1. Connect to your RDS/Aurora instance and create a new database user with the following command:
+    ```sql
+    CREATE USER clickpipes_iam_user; 
+    GRANT rds_iam TO clickpipes_iam_user;
+    ```
+2. Follow the rest of the steps in the [PostgreSQL source setup guide](./source/rds) to configure your RDS instance for ClickPipes.
+
+##### MySQL / MariaDB {#setting-up-the-database-user-mysql}
+
+1. Connect to your RDS/Aurora instance and create a new database user with the following command:
+    ```sql
+    CREATE USER 'clickpipes_iam_user' IDENTIFIED WITH AWSAuthenticationPlugin AS 'RDS';
+    ```
+2. Follow the rest of the steps in the [MySQL source setup guide](../mysql/source/rds) to configure your RDS/Aurora instance for ClickPipes.
+
+### Setting up the IAM role {#setting-up-iam-role}
+
 #### Manually create IAM role. {#manually-create-iam-role}
 
 1 - Login to your AWS Account in the web browser with an IAM user that has permission to create & manage IAM role.

docs/integrations/data-ingestion/clickpipes/postgres/source/aurora.md

@@ -98,17 +98,6 @@ Connect to your Aurora PostgreSQL writer instance as an admin user and execute t
 
    The `clickpipes` publication defines the set of tables whose change events will be streamed to ClickPipes. We recommend against using `FOR ALL TABLES` unless you intend to replicate every table, as including unnecessary tables increases WAL traffic from Postgres to ClickPipes and reduces overall replication efficiency.
 
-### Using IAM authentication (optional) {#iam-authentication}
-
-Instead of a password, you can authenticate the ClickPipes user via AWS IAM role-based access. This requires the `rds.iam_auth_for_replication` parameter to be set to `1`. Create the user as follows, then grant it the same schema and replication privileges shown above:
-
-```sql
-CREATE USER clickpipes_iam_user;
-GRANT rds_iam TO clickpipes_iam_user;
-```
-
-See [AWS IAM DB authentication (RDS/Aurora)](/integrations/clickpipes/postgres/auth) for the full steps to set up the IAM role and policy required for ClickPipes to authenticate this way.
-
 ## Configure network access {#configure-network-access}
 
 ### IP-based access control {#ip-based-access-control}

docs/integrations/data-ingestion/clickpipes/postgres/source/rds.md

@@ -98,21 +98,6 @@ Connect to your RDS Postgres instance as an admin user and execute the following
 
    The `clickpipes` publication defines the set of tables whose change events will be streamed to ClickPipes. We recommend against using `FOR ALL TABLES` unless you intend to replicate every table, as including unnecessary tables increases WAL traffic from Postgres to ClickPipes and reduces overall replication efficiency.
 
-### Using IAM authentication (optional) {#iam-authentication}
-
-Instead of a password, you can authenticate the ClickPipes user via AWS IAM role-based access. Create the user as follows, then grant it the same schema and replication privileges shown above:
-
-```sql
-CREATE USER clickpipes_iam_user;
-GRANT rds_iam TO clickpipes_iam_user;
-```
-
-:::note
-IAM authentication for replication requires the `rds.iam_auth_for_replication` parameter to be set to `1`. This is supported from PostgreSQL version 11 onwards; on earlier versions, you can only run `Initial Load Only` ClickPipes.
-:::
-
-See [AWS IAM DB authentication (RDS/Aurora)](/integrations/clickpipes/postgres/auth) for the full steps to set up the IAM role and policy required for ClickPipes to authenticate this way.
-
 ## Configure network access {#configure-network-access}
 
 ### IP-based access control {#ip-based-access-control}