Get Access Token #

{
    "x-request-id": string;
    "x-session-id": string;
}

{
    "grantType": "authorization_code",
    "clientID": string;
    "clientSecret": string;
    "code": string;
}

{
    "access_token": string;
    "token_type": "token";
    "expires_in": number; // unit: seconds
    "refresh_token": string;
}

{
    "error": string;
    "error_description": string;
}