fix(mongodb): support createUser shell commands

Closes #5639

src-tauri/src/commands/mongo_cmd.rs

@@ -334,6 +334,36 @@ pub async fn mongo_create_index(
     Ok(serde_json::json!({ "name": name }))
 }
 
+#[tauri::command]
+pub async fn mongo_create_user(
+    state: State<'_, Arc<AppState>>,
+    connection_id: String,
+    database: String,
+    user_json: String,
+    write_concern_json: Option<String>,
+    mcp_request: Option<bool>,
+) -> Result<serde_json::Value, String> {
+    if mcp_request == Some(true) {
+        crate::commands::mcp_bridge::ensure_mcp_dangerous_write_allowed_by_id(
+            state.inner(),
+            &connection_id,
+            &database,
+            "Create user",
+        )
+        .await?;
+    }
+    ensure_connection_writable(&state, &connection_id, "Create user").await?;
+    let affected_rows = dbx_core::mongo_ops::mongo_create_user_core(
+        &state,
+        &connection_id,
+        &database,
+        &user_json,
+        write_concern_json.as_deref(),
+    )
+    .await?;
+    Ok(serde_json::json!({ "affected_rows": affected_rows }))
+}
+
 #[tauri::command]
 pub async fn mongo_drop_indexes(
     state: State<'_, Arc<AppState>>,