fix(api-gateway): allow switch sql user when the new user is the same

Author: bsod90

packages/cubejs-api-gateway/src/sql-server.ts

@@ -301,9 +301,9 @@ export class SQLServer {
   protected createDefaultCanSwitchSqlUserFn(options: SQLServerOptions): CanSwitchSQLUserFn {
     const superUser = options.sqlSuperUser || getEnv('sqlSuperUser');
 
-    return async (current: string | null, _user: string) => {
+    return async (current: string | null, newUser: string) => {
       if (superUser) {
-        return current === superUser;
+        return current === superUser || current === newUser;
       }
 
       return false;