Adjusted the validation type

ref #56

src/models/actions/CreateStatsClient.ts

@@ -1,4 +1,4 @@
-import { IsOptional, IsString } from 'class-validator';
+import { IsBoolean, IsOptional, IsString } from 'class-validator';
 import crypto from "crypto";
 import { StatsClient } from '../entities/StatsClient';
 /**
@@ -15,7 +15,7 @@ export class CreateStatsClient {
     /**
      * Is the new client enabled.
      */
-    @IsString()
+    @IsBoolean()
     @IsOptional()
     enabled?: boolean;