All requests made to the XS2A API have to be authenticated by a Token that has to be provided in the
Authorization header prefixed with
HTTP Header example
Authorization: Token <validToken>
An access token can be generated in the Klarna Kosma Portal.
NOTE: The token is only visible once after creation. Store the generated token.
NOTE: A token is valid for 180 days. Make sure to replace any token before it expires with a new token.