add mysql and DAO

src/service/user.ts

@@ -0,0 +1,28 @@
+import {Context, inject, provide, plugin} from "midway";
+import { IUser } from '../interface/IUser';
+
+@provide('UserService')
+export class UserService {
+
+  @inject()
+  ctx: Context;
+
+  @plugin()
+  mysql: any;
+
+  async findById(uid: string){
+    const user = await this.mysql.get('user', { id: uid});
+    return { user }
+  }
+
+  async findByAccount(account: string){
+    const user = await this.mysql.get('user', { account: account});
+    return { user }
+  }
+
+  async addUser(data: IUser) {
+    const result = await this.mysql.insert('user', data)
+    return result
+  }
+
+}