1. Register in Square
2. Square's personal account contains data for integration with CRM: Access Token и Location ID
In section https://developer.squareup.com/us/en click “Get Start” and “+”
Give a name, click “Save”, click “Open”.
Then in section Production Credentials copy Access Token and insert into form
in DIKIDI. In section Location copy Location ID and insert into form in DIKIDI.
3. In your Square personal account, in the Webhooks section, you need to select Enabled. In the next line write the address indicated on the form in DIKIDI in red (https://payment.dikidi.net/...)