SF_14.0 - https://www.progress.com/documentation/sitefinity-cms/headless-request-access-token

RequestABearerTokenDefault.json

{
    "access_token": "bearer token value string omitted for brevity",
    "token_type": "bearer",
    "expires_in": 1799,
    "refresh_token": "9e06fe5b-5523-de88-8cd5-f5c1f2918fdb"
}