Swish

"PaymentProviders": [ "Swish" ]

Creating a client certificate

For those who have problems with OpenSSL tool commands

For Windows 10 and further versions, I suggest you install OpenSSL application via Git

The reason we install it that way is, first of all, the way shown in the document is not an official installation and might lead to some problems (even malware installation) and the 2nd reason is, unfortunately, there is no official installation for Windows provided by OpenSSL itself, and this is the most recommended way to do it as shown here.

Once you install Git, make sure openssl.exe file exists under this path "C:\Program Files\Git\usr\bin"