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Create request to IdP manually
To manually prepare a request to the Identity Provider (IdP), create a new TElSAMLAuthnRequestElement object and initialize at least the following properties: ID - with a random string value; IssueInstant - with the time of request creation; Issuer - with an Issuer element. The latter is represented by a TElSAMLIssuerElement class.
In addition to the above properties, the Request may specify the constraints on the subject's name identifier (NameIDPolicy). The request may be digitally signed.
When the AuthnRequest is created, call SaveToXML() to save and append it to an existing TElXMLDOMDocument.