feat(Shopify Node): Add OAuth support (#3389)

* ⚡ wip

* ⚡ Add includeAccessTokenInHeader option to OAuth2

* 🔨 fixed build error, fixed trigger node when using token auth

* 🔨 fixed trigger when using oauth2

* 🔨 changed default auth method to access token

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Rename includeAccessTokenInHeader to keyToIncludeInAccessTokenHeader

* ⚡ Assign values to only header property

* 🔥 Remove unreachable code

* ⚡ Add keyToIncludeInAccessTokenHeader when isN8nRequest

* ⚡ Add CC grant type when isN8nRequest

Co-authored-by: Ricardo Espinoza <ricardo@n8n.io>
Co-authored-by: ricardo <ricardoespinoza105@gmail.com>
Co-authored-by: Jan Oberhauser <janober@users.noreply.github.com>

packages/nodes-base/credentials/ShopifyOAuth2Api.credentials.ts

@@ -0,0 +1,86 @@
+import {
+	ICredentialType,
+	INodeProperties,
+} from 'n8n-workflow';
+
+export class ShopifyOAuth2Api implements ICredentialType {
+	name = 'shopifyOAuth2Api';
+	extends = [
+		'oAuth2Api',
+	];
+	displayName = 'Shopify OAuth2 API';
+	documentationUrl = 'shopify';
+	properties: INodeProperties[] = [
+		{
+			displayName: 'Shop Subdomain',
+			name: 'shopSubdomain',
+			required: true,
+			type: 'string',
+			default: '',
+			description: 'Only the subdomain without .myshopify.com',
+		},
+		{
+			displayName: 'Grant Type',
+			name: 'grantType',
+			type: 'hidden',
+			default: 'authorizationCode',
+		},
+		{
+			displayName: 'Client ID',
+			name: 'clientId',
+			type: 'string',
+			default: '',
+			required: true,
+			hint: 'Be aware that Shopify refers to the Client ID as API Key',
+		},
+		{
+			displayName: 'Client Secret',
+			name: 'clientSecret',
+			type: 'string',
+			typeOptions: {
+				password: true,
+			},
+			default: '',
+			required: true,
+			hint: 'Be aware that Shopify refers to the Client Secret as API Secret Key',
+		},
+		{
+			displayName: 'Grant Type',
+			name: 'grantType',
+			type: 'hidden',
+			default: 'authorizationCode',
+		},
+		{
+			displayName: 'Authorization URL',
+			name: 'authUrl',
+			type: 'hidden',
+			default: '=https://{{$self["shopSubdomain"]}}.myshopify.com/admin/oauth/authorize',
+			required: true,
+		},
+		{
+			displayName: 'Access Token URL',
+			name: 'accessTokenUrl',
+			type: 'hidden',
+			default: '=https://{{$self["shopSubdomain"]}}.myshopify.com/admin/oauth/access_token',
+			required: true,
+		},
+		{
+			displayName: 'Scope',
+			name: 'scope',
+			type: 'hidden',
+			default: 'write_orders read_orders write_products read_products',
+		},
+		{
+			displayName: 'Auth URI Query Parameters',
+			name: 'authQueryParameters',
+			type: 'hidden',
+			default: 'access_mode=value',
+		},
+		{
+			displayName: 'Authentication',
+			name: 'authentication',
+			type: 'hidden',
+			default: 'body',
+		},
+	];
+}