504 Gateway Time-out error when making cURL request in WordPress

The documentation wants you to insert the proper values where they use double curly braces.

To consume this API you must replace in the url {{{wolkvox_server}} by the nomenclature of the server of the operation.

In your particular account, they will give you the values you need to subsitute, meaning the server name, the campaign id, campaign type, etc.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)