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/workflow/src/Interfaces.ts

@@ -38,12 +38,17 @@ export interface IBinaryData {
 	id?: string;
 }
 
+// All properties in this interface except for
+// "includeCredentialsOnRefreshOnBody" will get
+// removed once we add the OAuth2 hooks to the
+// credentials file.
 export interface IOAuth2Options {
 	includeCredentialsOnRefreshOnBody?: boolean;
 	property?: string;
 	tokenType?: string;
 	keepBearer?: boolean;
 	tokenExpiredStatusCode?: number;
+	keyToIncludeInAccessTokenHeader?: string;
 }
 
 export interface IConnection {