How to pass a custom body on token refresh request

[donnes]

Hello!

I have a question about usage this module. My authentication API is using OAuth 2.0 protocol and to refresh a token I need pass some key/value params on the body.

Example:

{
        "client_id": CLIENT_ID,
        "client_secret": CLIENT_SECRET,
        "grant_type": "refresh_token",
        "refresh_token": "A_VERY_BIG_STRING"
}

Code example:

export const attemptTokenRefresh = () => {
  return async (dispatch, getState) => {
    const state = getState();
    dispatch({
      [CALL_API]: {
        endpoint: '/auth/oauth2_token',
        method: 'POST',
        body: {
          client_id: CLIENT_ID,
          client_secret: CLIENT_SECRET,
          grant_type: 'refresh_token',
          refresh_token: state.auth.refresh_token
        },
        types: [
          ActionTypes.TOKEN_REFRESH_REQUEST,
          ActionTypes.TOKEN_REFRESH_SUCCESS,
          ActionTypes.TOKEN_REFRESH_FAILURE
        ]
      }
    });
  };
};

I'm passing this parameters at the attemptTokenRefresh action, but I don't know if it's the best way to do that. What you think?