Solved: Context.User.Identity.name in C#

Hello Experts,

I have successfully parsed SAML response and got the username from the SAML assertion attribute (this.UserID holds the username) but I don't know how to pass this username to Context.User.Identity.name in the startup.cs. Could you please please help? Any assistance is greatly appreciated. This is very urgent. Thank you so much

Attached is my startup.cs code

 
                    @if (Context.User.Identity.Name != null)
                    {
                        <li class="text-white">
                            <a href="#">@Context.User.Identity.Name </a>
                        </li>
                        <li>
                            <form asp-controller="Account" asp-action="Logout" method="post">
                                <button type="submit" class="btn btn-link" name="provider" value="Saml2">Sign out</button>
                            </form>
                        </li>
                    }
                    else
                    {
                        <li>
                            <form asp-controller="Account" asp-action="ExternalLogin" method="post">
                                <button type="submit" class="btn btn-link" name="provider" value="Saml2">Sign In</button>
                            </form>
                        </li>
                    }

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Here is my saml parsed code

string encodedSaml = this.Request.Form["SAMLResponse"];
            //EncodedeSAML = rawSamlData;
            // the sample data sent us may be already encoded, 
            // which results in double encoding
            if (encodedSaml.Contains('%'))
            {
                encodedSaml = System.Web.HttpUtility.UrlDecode(encodedSaml);
            }

            // read the base64 encoded bytes
            string samlAssertion = Decode64Bit(encodedSaml);
            DecodedSAML = samlAssertion;
            //SamlParser(DecodedSAML);

            //samldata = Decode64Bit("PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4=") + samldata;
            string samldata = DecodedSAML;

            if (!samldata.StartsWith(@"<?xml version="))
            {
                samldata = Decode64Bit("PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4=") + samldata;
            }

            string firstName = string.Empty;
            XmlDocument xDoc = new XmlDocument();
            samldata = samldata.Replace(@"\", "");
            xDoc.LoadXml(samldata);
            //xDoc.Load(new System.IO.TextReader());//Suppose the xml you have provided is stored in this xml file.

            XmlNamespaceManager xMan = new XmlNamespaceManager(xDoc.NameTable);
            xMan.AddNamespace("samlp", "urn:oasis:names:tc:SAML:2.0:protocol");
            xMan.AddNamespace("saml", "urn:oasis:names:tc:SAML:2.0:assertion");
            xMan.AddNamespace("ds", "http://www.w3.org/2000/09/xmldsig#");


            XmlNode xNode = xDoc.SelectSingleNode("/samlp:Response/samlp:Status/samlp:StatusCode/@Value", xMan);
            if (xNode != null)
            {
                this.AuthenticationStatus = false;
                string statusCode = xNode.Value;
                if (statusCode.EndsWith("status:Success"))
                {
                    this.AuthenticationStatus = true;

                }

            }

                        // samlp:Response  saml:Assertion saml:AttributeStatement saml:Attribute
            xNode = xDoc.SelectSingleNode("/samlp:Response/saml:Assertion/saml:AttributeStatement/saml:Attribute[@Name = 'urn:oid:0.9.2342.19200300.100.1.1']/saml:AttributeValue", xMan);
            if (xNode != null)
            {
                
                this.UserID = xNode.InnerText;
            
            }

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