Getting error "message Unauthorized" - but not able to resolve it

New to APIs/Postman
1

Hi…I am a newbie college student and need some urgent help in running an API. I am trying to test it via postman but I am getting errors so need help in configuring. The API call I need to make is Create a talk. The API developers have given me the following Authorization details - "Your API credentials:
API key - bHRpY3VsdHwuY29tcHJhbmF2Lm11VyYWxAZ21haW
API secret - pQaE-ceDi3nFzUNNzoYi

How to use them?
Add to the messages authorization header:
Authorization: Basic bHRpY3VsdHwuY29tcHJhbmF2Lm11VyYWxAZ21haW: pQaE-ceDi3nFzUNNzoYi" (I’ve changed the API key to hide secret). Can someone please tell me how to setup this test request in Postman?

Also when I am trying to test it using Curl as below, what is the mistake I am making? as I am getting the below error
curl --request POST --url https://api.d-id.com/talks
–header ‘content-Type: application/json’
–header ‘accept: application/json’
–header ‘authorization: Basic bHRpY3VsdHwuY29tcHJhbmF2Lm11VyYWxAZ21haW: pQaE-ceDi3nFzUNNzoYi’
–data ‘{ "source_url": "Dropbox - MummyMugshot1.jpg - Simplify your life" }’

Error Message
{“message”:“Unauthorized”}
curl: (3) URL using bad/illegal format or missing URL

2

Add the API key and API secret to an environment or collection variable.
For example API_KEY and API_SECRET

Create a post request to https://api.d-id.com/talks

In that post request, go to the headers tab and set the content-Type and accept headers.

Finally, add the authorization header.
The value can point to the previously saved variables.

Basic {{API_KEY}}:{{API_SECRET)

In the request, copy and paste the body. (It should be set as raw\JSON).