Errors on src/restClient.ts

[Himadu2000]

src/restClient.ts:22:14 - error TS2339: Property 'body' does not exist on type '{ method: string; headers: { "Content-Type": string; Authorization: string; }; }'.

22 config.body = JSON.stringify(data)
~~~~

src/restClient.ts:49:59 - error TS2345: Argument of type 'string' is not assignable to parameter of type '{ [key: string]: any; }'.

49 ${this.baseUrl}${endpoint}?${queryString.stringify(filter)},
~~~~~~

src/restClient.ts:50:35 - error TS2554: Expected 2 arguments, but got 3.

50 this.getConfig("get", null, cookie)
~~~~~~

src/restClient.ts:74:48 - error TS2554: Expected 2 arguments, but got 1.

74 return fetch(this.baseUrl + endpoint, this.getConfig("delete")).then(
~~~~~~~~~~~~~~~~~~~

src/restClient.ts:12:29
12 getConfig(method: string, data: string) {
~~~~~~~~~~~~
An argument for 'data' was not provided.