STEP 1 :
Go to https://developers.dropbox.com/ and click on CreateApp (On DBX Platform), you will be asked to login. Login with your details or you can register freshly.
STEP2 :
Once logged in fill in the details as shown in screenshot below, you can give any name as per your liking and click on create app.
STEP 3 :
After this in the next screen you can see the AppKey and AppSecret. Copy these values and paste it in Site Properties of “DropBoxReactive_Connector” in appropriate fields.
STEP 4 :
Next step is to register the callback URL. Enter the callback URL as shown in the screenshot below. Make sure to update your environment in the URL. This is a format for URL :
https://<your env here>/DropBoxConnector_Reactive/DropBoxOAuthCallback
Click on Add button and URL will get added.
STEP 5 :
Next is to provide permissions. Go to permissions tab and tick on all the fields as shown in the screenshot below and click on submit.
If you want to read more about this here : https://developers.dropbox.com/oauth-guide
STEP 6 :
There is no step 6, you are all set and can start using the connector. You can also refer demo application for further understanding about how to use this connector.
DropBox API Explorer : https://dropbox.github.io/dropbox-api-v2-explorer/
DropBox API Documentation : https://www.dropbox.com/developers/documentation/http/documentation