修复打字稿字符串和对象错误

Question

我有一个看起来像这样的 ts 类型

class ImageServices {
  services: SERVICE;
  constructor(services: SERVICE) {
    // creating key-value pair, key -> name of service, value api key (easy to access)
    this.services = { ...services };
  }

服务接口在哪里

export interface SERVICE {
  unsplash?: string;
  pexels?: string;
  pixabay?: string;
  shutterstock?: SHUTTERSTOCK_INIT;
}

和 SHUTTERSTOCK_INIT 就是这个

export interface SHUTTERSTOCK_INIT {
  consumer_id: string;
  consumer_secret: string;
}

现在，在我的类函数中，我正在这样做

  async getSpecificServiceData(inputParams: QUERY_PARAMS, service: SERVICENAME): Promise<IMAGE_RESPONSE> {
    const clientId = this.services[service]
    if (!clientId) throw new Error(`Client ID does not exist for service ${service}`)
    if (
      service === "unsplash" &&
      canMakeApiRequest(unsplash_allowed_props, inputParams) 
    ) {
        return await this.getDataFromUnsplash(clientId, inputParams);
    } else if (
      service === "pexels" &&
      canMakeApiRequest(Pexels, inputParams)
    ) 
     }  else if (service === "shutterstock" && typeof clientId === 'object') {
        return await this.getDataFromShutterStock(clientId, inputParams);
    }
    {
        return await this.getDataFromPexels(clientId, inputParams);
     else {
        throw new Error('Service Passed does not exist or problem with input params')
    }
  }

这里是SERVICENAME

export type SERVICENAME = "unsplash" | "pexels" | "pixabay" | "shutterstock";

错误

这里出现以下错误

Argument of type 'string | SHUTTERSTOCK_INIT' is not assignable to parameter of type 'string'.
  Type 'SHUTTERSTOCK_INIT' is not assignable to type 'string'.

和

Type 'string' is not assignable to type 'SHUTTERSTOCK_INIT'

我可以使用 ts-ignore，但无论如何要在不使用 ts-ignore 和 typeof 的情况下解决这些问题，即 typeof clientId === 'object' 用于快门库存而 typeof clientId === 'string' 用于其他？

更新

这些行 await this.getDataFromPexels(clientId, inputParams);

和return await this.getDataFromShutterStock(clientId, inputParams);

对于 getDataFromPexels 和其他服务，clientId 类型为 string，仅对于 getDataFromShutterStock，clientId 类型为 SHUTTERSTOCK_INIT