Navigate to FlexmlsIDX > FlexmlsIDX > Account under the menu in WordPress.
Enter in the key/secret provide to you in the getting started email and hit 'Save Credentials'
If done correctly you should see a green 'connected' label:
Google Maps Key (optional, yet recommended):
In order for maps to display on your website, you must include a Google Maps API Key:
https://developers.google.com/maps/documentation/javascript/get-api-key#console
It is best to follow Google's documentation for the Map API key.
After you have setup your key navigate to FlexmlsIDX > Settings > Google Maps:
Default Map Height: Enter a height value in px. (i.e. enter 350px)
Google Maps Javascript: If checked, the Google Maps JavaScript will not be loaded by the plugin. Use this if your theme or other plugins already load the Google Maps Script and your API Key.
Nginx
If you see this message above your plugin key, click on the message for more detail or see our nginx page.