Adds parameters to app host usage examples, where applicable

docs/database/includes/postgresql-explicit-username-password.md

@@ -0,0 +1,15 @@
+When you want to explicitly provide the username and password, you can provide those as parameters. Consider the following alternative example:
+
+```csharp
+var username = builder.AddParameter("username", secret: true);
+var password = builder.AddParameter("password", secret: true);
+
+var postgres = builder.AddPostgres("postgres", username, password);
+
+var postgresdb = postgres.AddDatabase("postgresdb");
+
+var exampleProject = builder.AddProject<Projects.ExampleProject>()
+                            .WithReference(postgresdb);
+```
+
+For more information, see [External parameters](../../fundamentals/external-parameters.md).

docs/database/mysql-component.md

@@ -2,7 +2,7 @@
 title: .NET Aspire MySQL database component
 description: This article describes the .NET Aspire MySQL database component.
 ms.topic: how-to
-ms.date: 05/14/2024
+ms.date: 06/03/2024
 ---
 
 # .NET Aspire MySQL database component
@@ -69,6 +69,20 @@ var myService = builder.AddProject<Projects.MyService>()
                        .WithReference(mysqldb);
 ```
 
+When you want to explicitly provide a root MySQL password, you can provide it as a parameter. Consider the following alternative example:
+
+```csharp
+var password = builder.AddParameter("password", secret: true);
+
+var mysql = builder.AddMySql("mysql", password);
+var mysqldb = mysql.AddDatabase("mysqldb");
+
+var myService = builder.AddProject<Projects.MyService>()
+                       .WithReference(mysqldb);
+```
+
+For more information, see [External parameters](../fundamentals/external-parameters.md).
+
 ## Configuration
 
 The .NET Aspire MySQL database component provides multiple configuration approaches and options to meet the requirements and conventions of your project.

docs/database/oracle-entity-framework-component.md

@@ -1,7 +1,7 @@
 ---
 title: Oracle Entity Framework Component
 description: Oracle Entity Framework Component
-ms.date: 05/14/2024
+ms.date: 06/03/2024
 ---
 
 # .NET Aspire Oracle Entity Framework Component
@@ -86,6 +86,20 @@ var myService = builder.AddProject<Projects.MyService>()
                        .WithReference(oracledb);
 ```
 
+When you want to explicitly provide a password, you can provide it as a parameter. Consider the following alternative example:
+
+```csharp
+var password = builder.AddParameter("password", secret: true);
+
+var oracle = builder.AddOracle("oracle", password);
+var oracledb = oracle.AddDatabase("oracledb");
+
+var myService = builder.AddProject<Projects.MyService>()
+                       .WithReference(oracledb);
+```
+
+For more information, see [External parameters](../fundamentals/external-parameters.md).
+
 ## Configuration
 
 The .NET Aspire Oracle Entity Framework Core component provides multiple options to configure the database connection based on the requirements and conventions of your project.

docs/database/postgresql-component.md

@@ -1,7 +1,7 @@
 ---
 title: .NET Aspire PostgreSQL component
 description: This article describes the .NET Aspire PostgreSQL component.
-ms.date: 05/14/2024
+ms.date: 06/03/2024
 ms.topic: how-to
 ---
 
@@ -58,6 +58,8 @@ var exampleProject = builder.AddProject<Projects.ExampleProject>()
                             .WithReference(postgresdb);
 ```
 
+[!INCLUDE [postgresql-explicit-username-password](includes/postgresql-explicit-username-password.md)]
+
 ## Configuration
 
 The .NET Aspire PostgreSQL component provides multiple configuration approaches and options to meet the requirements and conventions of your project.

docs/database/postgresql-entity-framework-component.md

@@ -2,7 +2,7 @@
 title: .NET Aspire PostgreSQL Entity Framework Core component
 description: This article describes the .NET Aspire PostgreSQL Entity Framework Core component.
 ms.topic: how-to
-ms.date: 05/14/2024
+ms.date: 06/03/2024
 ---
 
 # .NET Aspire PostgreSQL Entity Framework Core component
@@ -72,6 +72,8 @@ var myService = builder.AddProject<Projects.MyService>()
                        .WithReference(postgresdb);
 ```
 
+[!INCLUDE [postgresql-explicit-username-password](includes/postgresql-explicit-username-password.md)]
+
 ## Configuration
 
 The .NET Aspire PostgreSQL Entity Framework Core component provides multiple configuration approaches and options to meet the requirements and conventions of your project.

docs/database/qdrant-component.md

@@ -2,7 +2,7 @@
 title: .NET Aspire Qdrant component
 description: This article describes the .NET Aspire Qdrant component.
 ms.topic: how-to
-ms.date: 05/22/2024
+ms.date: 06/03/2024
 ---
 
 # .NET Aspire Qdrant component
@@ -75,6 +75,19 @@ var myService = builder.AddProject<Projects.MyService>()
                        .WithReference(qdrant);
 ```
 
+When you want to explicitly provide the API key, you can provide it as a parameter. Consider the following alternative example:
+
+```csharp
+var apiKey = builder.AddParameter("apikey", secret: true);
+
+var qdrant = builder.AddQdrant("qdrant", apiKey);
+
+var myService = builder.AddProject<Projects.MyService>()
+                       .WithReference(qdrant);
+```
+
+For more information, see [External parameters](../fundamentals/external-parameters.md).
+
 ## Configuration
 
 The .NET Aspire Qdrant Client component provides multiple options to configure the server connection based on the requirements and conventions of your project.

docs/database/sql-server-component.md

@@ -2,7 +2,7 @@
 title: .NET Aspire SQL Server component
 description: This article describes the .NET Aspire SQL Server component.
 ms.topic: how-to
-ms.date: 05/14/2024
+ms.date: 06/03/2024
 ---
 
 # .NET Aspire SQL Server component
@@ -71,6 +71,20 @@ var myService = builder.AddProject<Projects.MyService>()
                        .WithReference(sqldb);
 ```
 
+When you want to explicitly provide a root SQL password, you can provide it as a parameter. Consider the following alternative example:
+
+```csharp
+var password = builder.AddParameter("password", secret: true);
+
+var sql = builder.AddSqlServer("sql", password);
+var sqldb = sql.AddDatabase("sqldb");
+
+var myService = builder.AddProject<Projects.MyService>()
+                       .WithReference(sqldb);
+```
+
+For more information, see [External parameters](../fundamentals/external-parameters.md).
+
 ## Configuration
 
 The .NET Aspire SQL Server component provides multiple configuration approaches and options to meet the requirements and conventions of your project.

docs/messaging/rabbitmq-client-component.md

@@ -2,7 +2,7 @@
 title: .NET Aspire RabbitMQ component
 description: Learn how to use the .NET Aspire RabbitMQ client message-broker component.
 ms.topic: how-to
-ms.date: 05/14/2024
+ms.date: 06/03/2024
 ---
 
 # .NET Aspire RabbitMQ component
@@ -79,6 +79,21 @@ builder.AddProject<Projects.ExampleProject>()
 
 The <xref:Aspire.Hosting.ResourceBuilderExtensions.WithReference%2A> method configures a connection in the `ExampleProject` project named `messaging`.
 
+When you want to explicitly provide the username and password, you can provide those as parameters. Consider the following alternative example:
+
+```csharp
+var username = builder.AddParameter("username", secret: true);
+var password = builder.AddParameter("password", secret: true);
+
+var messaging = builder.AddRabbitMQ("messaging", username, password);
+
+// Service consumption
+builder.AddProject<Projects.ExampleProject>()
+       .WithReference(messaging);
+```
+
+For more information, see [External parameters](../fundamentals/external-parameters.md).
+
 ## Configuration
 
 The .NET Aspire RabbitMQ component provides multiple options to configure the connection based on the requirements and conventions of your project.