curl --request GET \
  --url https://saas.pads365.com/rdx/NDS.Services.Authentication/api/v1/ExternalAuthenticationProvider

{
  "Succeeded": true,
  "Message": "<string>",
  "Code": "<string>",
  "Providers": [
    {
      "Type": "<string>",
      "Name": "<string>",
      "FederationServiceIdentifier": "<string>",
      "MetaDataUrl": "<string>",
      "ReplyUrl": "<string>",
      "Id": "<string>",
      "LegacyCrystalProvider": true,
      "Configuration": {
        "Certificates": [
          {
            "Thumbprint": "<string>",
            "External": true
          }
        ]
      },
      "ScimConfig": {
        "Enabled": true,
        "Url": "<string>",
        "AccessToken": "<string>"
      },
      "ClaimsMappings": [
        {
          "Id": "<string>",
          "ExternalAuthenticationProviderId": "<string>",
          "ExternalAttribute": "<string>",
          "LocalAttribute": "<string>"
        }
      ]
    }
  ]
}