Look at all error codes for limited query fallback (#5549) (#5550)

Part of #5544

Author: alexr00

src/github/githubRepository.ts

@@ -122,6 +122,12 @@ export interface IMetadata extends OctokitCommon.ReposGetResponseData {
 	currentUser: any;
 }
 
+interface GraphQLError {
+	extensions: {
+		code: string;
+	};
+}
+
 export class GitHubRepository implements vscode.Disposable {
 	static ID = 'GitHubRepository';
 	protected _initialized: boolean = false;
@@ -249,7 +255,7 @@ export class GitHubRepository implements vscode.Disposable {
 				return this.query(query, ignoreSamlErrors);
 			}
 
-			if (e.graphQLErrors && e.graphQLErrors.length && (e.graphQLErrors[0].extensions && e.graphQLErrors[0].extensions.code === 'undefinedField') && !this._areQueriesLimited) {
+			if (e.graphQLErrors && e.graphQLErrors.length && ((e.graphQLErrors as GraphQLError[]).some(error => error.extensions.code === 'undefinedField')) && !this._areQueriesLimited) {
 				// We're running against a GitHub server that doesn't support the query we're trying to run.
 				// Switch to the limited schema and try again.
 				this._areQueriesLimited = true;