Added option to connect to self-hosted Grist instance.

packages/nodes-base/credentials/GristApi.credentials.ts

@@ -29,6 +29,10 @@ export class GristApi implements ICredentialType {
 					name: 'Paid',
 					value: 'paid',
 				},
+				{
+					name: 'Self-hosted',
+					value: 'selfhosted',
+				},				
 			],
 		},
 		{
@@ -46,5 +50,20 @@ export class GristApi implements ICredentialType {
 				},
 			},
 		},
+		{
+			displayName: 'Self-hosted URL',
+			name: 'selfHostedUrl',
+			type: 'string',
+			default: '',
+			required: true,
+			description: 'URL of your Grist instance (include http/https without /api and no trailing slash)',
+			displayOptions: {
+				show: {
+					planType: [
+						'selfhosted',
+					],
+				},
+			},
+		},
 	];
 }