Regenerate access token

curl --request POST \
  --url https://your_a2_service/settings/access_token \
  --header 'Authorization: Bearer <token>'

{
  "access_token": {
    "access_token": "<string>",
    "token_type": "Bearer"
  },
  "currency": "<string>",
  "external_channel_url": "<string>",
  "language": "<string>",
  "tls_domain": "<string>",
  "tls_enable": true,
  "yield_optimization": {
    "ceiling_cpm": 123,
    "floor_cpm": 123,
    "yield_roas_balance": 0.5
  },
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}