chore: refine the connection description for SDKs

GreptimeTeam · Aug 30, 2024 · 6d858c5 · 6d858c5
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diff --git a/docs/user-guide/ingest-data/for-iot/grpc-sdks/go.md b/docs/user-guide/ingest-data/for-iot/grpc-sdks/go.md
@@ -43,6 +43,7 @@ cfg := greptime.NewConfig("127.0.0.1").
     // Enable secure connection if your server is secured by TLS
     // WithInsecure(false).
     // set authentication information
+    // If the database doesn't require authentication, just leave the username and password empty
     WithAuth("username", "password")
 
 cli, _ := greptime.NewClient(cfg)

diff --git a/docs/user-guide/ingest-data/for-iot/grpc-sdks/template.md b/docs/user-guide/ingest-data/for-iot/grpc-sdks/template.md
@@ -12,9 +12,9 @@ For more information, refer to [Automatic Schema Generation](/user-guide/ingest-
 
 ## Connect to database
 
-Username and password are always required to connect to GreptimeDB.
-For how to set authentication to GreptimeDB, see [Authentication](/user-guide/clients/authentication.md).
-Here we set the username and password when using the library to connect to GreptimeDB.
+If you have set the [`--user-provider` configuration](/user-guide/clients/authentication.md) when starting GreptimeDB,
+you will need to provide a username and password to connect to GreptimeDB.
+The following example shows how to set the username and password when using the library to connect to GreptimeDB.
 
 <InjectContent id="ingester-lib-connect" content={props.children}/>