docs: user authentication for connecting to Databend (#1045)

* added

* updates

---------

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

Author: soyeric128

docs/en/guides/30-sql-clients/00-bendsql/index.md

@@ -66,9 +66,15 @@ When building from source, some dependencies may involve compiling C/C++ code. E
 cargo install bendsql
 ```
 
+## User Authentication
+
+If you are connecting to a self-hosted Databend instance, you can use the admin users specified in the [databend-query.toml](https://github.com/datafuselabs/databend/blob/main/scripts/distribution/configs/databend-query.toml) configuration file, or you can connect using an SQL user created with the [CREATE USER](/sql/sql-commands/ddl/user/user-create-user) command. 
+
+For connections to Databend Cloud, you can use the default `cloudapp` user or an SQL user created with the [CREATE USER](/sql/sql-commands/ddl/user/user-create-user) command. Please note that the user account you use to log in to the [Databend Cloud console](https://app.databend.com/) cannot be used for connecting to Databend Cloud.
+
 ## Tutorials
 
-- [Connecting to Databend using BendSQL](/tutorials/)
+- [Connecting to Self-Hosted Databend using BendSQL](/tutorials/)
 - [Connecting to Databend Cloud using BendSQL](/tutorials/connect/connect-to-databendcloud-bendsql)
 
 ## BendSQL Settings

docs/en/guides/30-sql-clients/01-jdbc/index.md

@@ -41,6 +41,12 @@ Databend recommends updating to the latest version of the Databend JDBC driver t
 
 4. Click **OK** to close the windows.
 
+## User Authentication
+
+If you are connecting to a self-hosted Databend instance, you can use the admin users specified in the [databend-query.toml](https://github.com/datafuselabs/databend/blob/main/scripts/distribution/configs/databend-query.toml) configuration file, or you can connect using an SQL user created with the [CREATE USER](/sql/sql-commands/ddl/user/user-create-user) command. 
+
+For connections to Databend Cloud, you can use the default `cloudapp` user or an SQL user created with the [CREATE USER](/sql/sql-commands/ddl/user/user-create-user) command. Please note that the user account you use to log in to the [Databend Cloud console](https://app.databend.com/) cannot be used for connecting to Databend Cloud.
+
 ## Tutorials
 
 - [Connecting to Databend using DBeaver](/tutorials/connect/connect-to-databend-dbeaver)

docs/en/guides/30-sql-clients/index.md

@@ -3,8 +3,8 @@ title: Connect to Databend
 ---
 import IndexOverviewList from '@site/src/components/IndexOverviewList';
 
-To connect effortlessly to Databend and Databend Cloud, BendSQL is recommended. It offers a user-friendly experience, streamlining the connection process. 
+To connect effortlessly to a self-hosted Databend instance or Databend Cloud, BendSQL is recommended. It offers a user-friendly experience, streamlining the connection process.
 
-Alternatively, you can also leverage Databend's JDBC driver for a more customizable integration. Explore the following links to get started:
+Alternatively, you can leverage Databend's JDBC driver to connect with other SQL clients. Explore the following links to get started:
 
 <IndexOverviewList />

docs/en/tutorials/connect/connect-to-databend-bendsql.md

@@ -1,12 +1,12 @@
 ---
-title: 'Connecting to Databend using BendSQL'
-sidebar_label: 'Connecting to Databend (BendSQL)'
+title: 'Connecting to Self-Hosted Databend using BendSQL'
+sidebar_label: 'Connecting to Self-Hosted Databend (BendSQL)'
 slug: /
 ---
 import StepsWrap from '@site/src/components/StepsWrap';
 import StepContent from '@site/src/components/Steps/step-content';
 
-In this tutorial, we will guide you through the process of connecting to Databend using BendSQL as the user `root`.
+In this tutorial, we will guide you through the process of connecting to a self-hosted Databend instance using BendSQL as the user `root`.
 
 <StepsWrap>
 <StepContent number="1">

docs/en/tutorials/connect/connect-to-databend-dbeaver.md

@@ -1,12 +1,12 @@
 ---
-title: "Connecting to Databend using DBeaver"
-sidebar_label: "Connecting to Databend (DBeaver)"
+title: "Connecting to Self-Hosted Databend using DBeaver"
+sidebar_label: "Connecting to Self-Hosted Databend (DBeaver)"
 ---
 
 import StepsWrap from '@site/src/components/StepsWrap';
 import StepContent from '@site/src/components/Steps/step-content';
 
-In this tutorial, we will guide you through the process of connecting to Databend through the Databend JDBC driver as the user `root`.
+In this tutorial, we will guide you through the process of connecting to a self-hosted Databend instance through the Databend JDBC driver as the user `root`.
 
 <StepsWrap>
 <StepContent number="1">