use token directly as name

src/index.ts

@@ -86,7 +86,7 @@ export default class TypeORMPlugin extends BasePlugin<TypeORMPluginConfigLike> {
       entities,
       entityPrefix: `koishi_${token}_`,
       metadataTableName: `koishi_typeorm_metadata_${token}`,
-      name: `koishi_${token}`,
+      name: token,
       ...extraOptions,
     };
     const connection = await new Connection(connectionOptions).connect();