Refresh Token

Exchange a valid refresh token for a new access token.

POST `/auth/core/refresh`

Parameter	Type	Required	Description
`refresh_token`	string	Yes	A valid JWT refresh token.

Parameter	Type	Description
`access_token`	string	New short-lived JWT access token.
`expires_at`	integer	Timestamp (ms) when the access token expires.

{
  "refresh_token": "eyJhbGciOiJIUzI1Ni..."
}