Add trusted CA certificate

curl --request POST \
  --url https://api.gcore.com/cdn/sslCertificates \
  --header 'APIKey: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "Example CA cert",
  "sslCertificate": "-----BEGIN CERTIFICATE-----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\nZ8z+wUAP2g==\n-----END CERTIFICATE-----\n"
}'

{
  "id": 1,
  "name": "Example CA certificate",
  "deleted": true,
  "cert_issuer": "example.com",
  "cert_subject_cn": "example.com",
  "cert_subject_alt": "DNS:example.com",
  "validity_not_before": "2020-06-26 12:03:53+00:00",
  "validity_not_after": "2021-06-26 12:03:53+00:00",
  "sslCertificateChain": "",
  "hasRelatedResources": false
}