Function apiPostRequest

apiPostRequest(page: any, url: string, docString: any): Promise<void>
Makes a POST request with a JSON body provided via DocString.
Parameters
- page: any
- url: string
- docString: any
Returns Promise<void>
Example
```
When I pw make a POST request to "/api/login" with JSON body:
"""
{ "username": "admin", "password": "password123" }
"""
```
- Defined in backend/api/network.ts:119