MM-20698: Add server support for getting SAML metadata and updating S… (#13311)

* MM-20698: Add server support for getting SAMl metadata and updating SAMl settings

model/client4.go

@@ -3463,6 +3463,18 @@ func (c *Client4) GetSamlCertificateStatus() (*SamlCertificateStatus, *Response)
 	return SamlCertificateStatusFromJson(r.Body), BuildResponse(r)
 }
 
+func (c *Client4) GetSamlMetadataFromIdp(samlMetadataURL string) (*SamlMetadataResponse, *Response) {
+	requestBody := make(map[string]string)
+	requestBody["saml_metadata_url"] = samlMetadataURL
+	r, err := c.DoApiPost(c.GetSamlRoute()+"/metadatafromidp", MapToJson(requestBody))
+	if err != nil {
+		return nil, BuildErrorResponse(r, err)
+	}
+
+	defer closeBody(r)
+	return SamlMetadataResponseFromJson(r.Body), BuildResponse(r)
+}
+
 // Compliance Section
 
 // CreateComplianceReport creates an incoming webhook for a channel.